Wot u do with .net

XNA: Gaming across many platforms and the cloud

paulfo — Wed, 05 May 2010 15:25:53 GMT

I’ve been working with UK XNA MVP Charles Humphrey on project ZuneRay. ZuneRay is a raycasting engine built by Charles’ for the Zune HD using XNA 3.1. With Windows Phone 7 Series in the pipeline we used the Zune HD as a target test platform with the intention of porting it to WP7S once the tools became available. ZuneRay uses a classic approach to delivering a 3D experience without requiring 3D support – at the time we didn’t know if 3D support would be in the Windows Phone 7 Series XNA version – so it was a pleasant surprise to find 3D support in there, and very satisfying to see ZuneRay port to XNA 4.0 and the WP7S really easily.

Well the tools CTP is now available, so Charles and I have been working away on ZuneRay with excellent results. ZuneRay is an XNA 3.1 with Zune HD extensions project. You get a Windows version ‘for free’, and an Xbox version just required the additional of Gamepad support. Moving ZuneRay to WP7S required upgrading the project to XNA 4.0. There is no ‘wizard’ to do this, the best approach is to create a new XNA 4.0 game and then pull in all your existing code and content. There are some platform specific bits in the generated Game1.CS file that you want to ensure are retained – but coming from the Zune platform originally these already existed.

There are breaking changes between Xna 3.1 and Xna 4.0 – the main ones for ZuneRay being around storage API, change of screen resolution and the changes in SpriteBatch parameters – but none of these took long to sort out. Shawn Hargreaves pointed out that WP7S running at 800x480 has 25% more pixels to draw than the original Xbox – but less CPU/GPU power to do it. The WP7S has a dedicated hardware scaler which means you can render your game at lower resolutions – like 600x360 56% of pixel data - and have the device scale it to fill the screen. While developing in the emulator this scaling functionality isn’t available, but then as the emulator is just that – not a simulator – your game takes advantage of the underlying PC hardware performance.

Project ZuneRay

Now I have the game running across Windows, Xbox, Windows Phone 7 Series and Zune HD – I wanted to integrate the cloud. My idea for demonstration purposes was really simple. Capture a camera image, publish it to the cloud and then have ZuneRay games acquire the image and use it in game as a wall texture.

Storing my image in the cloud is very simple – the image copy to Windows Azure Blob storage just uses the code I posted a while back. To capture the web cam I used a WPF application by Geert van Horrik – all I had to add was the resizing of the image to fit with the game requirements before sending it to Azure blob storage.

To retrieve the image from the blob store proved to be the tricky part. Although XNA is hugely consistent across the platforms the networking support varies enormously. The Zune has no programmatic network support. The Xbox only has networking to the Xbox Live services. Windows Phone 7 Series has a good sprinkling of support in various areas and Windows of course has the lot.

Looking at Windows Phone I was able to use the following code to simple make a webrequest using a known URL to the current image file.

 private void GetTextureFromAzure()
{
 
    HttpWebRequest request;
 
    HttpWebResponse response = null;
 
    try
    {
 
        request = (HttpWebRequest)WebRequest.Create(new Uri(@"https://xxxx.blob.core.windows.net/publicfiles/dynamic.png"));
 
        response = (HttpWebResponse)request.BeginGetResponse(new AsyncCallback(RespCallback), request);
 
    }
    catch { }
}
 

The callback function then uses Texture2D.FromStream to create a new texture from the response stream.

 private void RespCallback(IAsyncResult asynchronousResult)
{
 
    try
    {
        HttpWebRequest myRequestState = (HttpWebRequest)asynchronousResult.AsyncState;
 
        HttpWebResponse response = (HttpWebResponse)myRequestState.EndGetResponse(asynchronousResult);
 
        Stream s = response.GetResponseStream();
 
        map.Textures[5] = Texture2D.FromStream(GraphicsDevice, s);
 
        s.Close();
 
        response.Close();
 
    }
 
    catch (System.Net.WebException)
    {
 
        //if (response != null)
 
        //    response.Close();
 
    }
 
}

The maps.texture array contains the textures presented as walls and objects in the game. By directly replacing the texture[5] only certain walls in the game levels present the web cam image, as can be seen below.

I use a count down timer to poll for a new image every minute for the purposes of this demo. I want to upgrade this poll mechanism with a push notification using the new Push Notification service for WP7S. In this way, the web cam application will be able to publish an image and then notify WP7S phones running the game of a new game texture. The games can then go and retrieve the image based on user preference for data service usage.

Charles and I intend to share more of Project ZuneRay’s code shortly.

Do you know how to get Microsoft Technical Support?

paulfo — Tue, 23 Feb 2010 21:11:34 GMT

When the chips are down and you’ve reach the point where you need help, it is reassuring to know Microsoft Support Professionals are only a phone call or maybe an email away. We want you to know what your paid-for and free Microsoft Support options are. We also want you to let us know if there’s anything we could do to improve our support offerings. Send us feedback at ukmsdn@microsoft.com we do want to hear from you.

Microsoft offers a range of support services designed to meet the needs of developers no matter what size of organisation you work in - from enterprises down, to small business to individuals. It is worth taking the time to understand what these offerings are – to ensure you get access to appropriate and timely support. If your organisation purchases Software Assurance, Essential or Premier services you should check with your contracts manager on the included support offerings.

As an individual developer or as a member of a developer team it is always worth remembering the maxim – ‘forewarned is forearmed’. On any issue or even during project planning, the freely available knowledgebase should be searched for known and potential issues. The knowledgebase is updated directly by Microsoft Support professionals when incidents are identified as repeatable issues.

There is a range of paid for Microsoft support services available for software developers. These are contained within the Professional Support service. There are a number of elements to this service as laid out below:

1. Professional Pay Per Incident

2. Professional Pay Per Incident 5 Pack

3. Business Critical After Hours Support

4. MSDN/TechNet Subscription Incident Support

After raising a paid-for support call, the next important thing is response time. How long will it take to get someone who knows what they are talking about to call you back? Microsoft has three support incident levels, Severity A, B and C. These each have an Initial Response Time associated with them.

Severity A: - 2 hours

Severity B: - 4 business hours

Severity C: - 8 business hours.

There are a number of common features to the support services.

1. Product coverage – all production versions of Microsoft servers, tools and business applications

2. Lifetime – full customer agreement is required to close an incident.

For current support service prices see this page.

Looking at each one in turn:

Professional Pay per Incident/ Professional Pay per Incident 5 Pack

Professional Pay per Incident provides a fixed cost single assisted break-fix support during business hours. You can start a support incident by phone or by email.

Support incidents can be purchased in packs of 5 with a 1 year lifetime from set up of contract.

Business Critical After Hours Support.

A fixed cost single assisted break-fix after business hours support request for Severity A issues on production versions of Microsoft server, tools and business applications. Support is purchase directly from Microsoft and is initiated by phone only. This is effectively the same as a Professional Pay per Incident but occurs outside normal business hours.

MSDN/TechNet Subscription Incident Support.

Depending on the style and level of your subscription you have between 2 and 4 incidents available for your use. These are assisted break-fix incidents, solution design services are available to developers under Premier Service contracts purchased annually.

Warranty Support.

In addition to these service offerings above there is also Warranty Support. 2 to 4 incidents may be included ‘in the box’ with certain Microsoft tools and business applications. For example MSDN Professional subscriptions include two no-charge support incidents, Visual Studio professional or higher with MSDN Premium include four no-charge support incidents, entitling you to technical product support from Microsoft either by telephone or online during normal business hours.

All Microsoft Technical Support services are subject to Microsoft Technical Support General Terms & Conditions.

SharePoint 2010 on Windows 7 x64

paulfo — Wed, 06 Jan 2010 13:51:56 GMT

I’m just completing the installation of a standalone development environment for SharePoint 2010 Beta on my Windows 7 x64 netbook. There are a few gotchas to doing this which I wanted to share with you, it turns out that they are all well documented by the SharePoint team but finding them is always easier if someone pulls together the reading list first.

The most comprehensive documentation is by Jie Li:

http://blogs.msdn.com/opal/archive/2009/11/16/installation-notice-for-sharepoint-2010-public-beta.aspx

http://blogs.msdn.com/opal/archive/2009/10/25/sharepoint-2010-pre-requisites-download-links.aspx

But I found my Configuration Wizard failing with ‘IIS Not Found’ and had to look further. Then I discovered the SharePoint team blog document:

http://msdn.microsoft.com/en-us/library/ee554869(office.14).aspx

In Step 8 of the above post, there is an IIS configuration script that needed to be run to. Once I’d done this from the wizard proceeded without issue until it had completed 8 out of 10 tasks.

It then failed again with ‘Failed to create sample data’. Looking into the log file I could see that a web service call had timed out. Suspecting that this was a ‘first run’ issue, I closed a few Windows and re-ran the configuration wizard…15 years as a MS techie doesn’t count for nothing you know ;-)

Of course, a more powerful machine is unlikely to encounter the time out. My target machine is my much loved Acer Ferrari One Netbook – the AMD L310 dual core, 64-bit wonder that I now carry by my side always. This machine is totally awesome, and with 4GB RAM installed, it can do a hell of a lot despite its diminutive size.

While typing the above, the config wizard has now completed the re-run of step 8 and has just finished successfully. I’m looking at the default SharePoint site running in IE8. Memory usage is quite high at 3.46GB, but after the default site creation (which took a while) performance navigating around the site is ok.

Now to get into the new VS2010 SharePoint devenv for some fun and games.

Windows 7: Building your own sensors

paulfo — Tue, 05 Jan 2010 13:08:26 GMT

Windows 7 has a built in sensor and location platform, the key feature of this is any sensor devices connected to it become operating system level resources which any number of applications can utilise the data from. Up until now, sensor devices (like GPS) were ‘owned’ by the first application to grab them, and prevented any other application from accessing the device while running. That has all changed in Windows 7, but we are still waiting for sensor manufactures to update their drivers to fit with the new world of Windows 7.

So while they ponder, lets get on and do some cool stuff ourselves!

The MS Press book ‘Introducing Windows 7 for developers’ has a great couple of chapters on the new sensor and location platform – chpr 9 and 10. These make excellent reading to help you understand just how everything works. Luckily for us, just before Christmas, Donn Morse posted a create article and sample on Coding4fun – so we can utilise Donn’s excellent work to make our custom sensors.

In the article, Donn uses the veritable Parallax Basic Stamp 2 as the intermediary between sensors and the Windows 7 machine. The Basic Stamp is well suited to utilising the range of cheap I2C based sensor devices that have been the main stay of homebrew and professional robotics development for decades.

The sample project includes Windows application, Windows 7 sensor driver and Basic Stamp firmware for linking up a motion detector, but also supports a compass sensor, a 2 axis accelerometer, and a ultra-sonic distance sensor. These devices are all inexpensively available from my good friends at Devantech – who also have USB to I2C interface modules including wireless versions. Using these interface modules obviously cuts out the need for a Basic Stamp 2 but requires the Sensor driver to do all the direct sensor work. I shall explore these options over the next few weeks and let you know how I get on!

I know many of you will think the Basic Stamp 2 is somewhat old hat and have been enjoying the more modern delights of the Arduino devices. As the Arduino development boards use USB rather than RS232 to communicate with the PC. Donn comments in his post that he is working with Brian Jepson to create a driver that works with the Arduino – so we can eagerly await this update.

Donn’s Windows application uses the Windows7.SensorAndLocation DLL from the Windows 7 Code Pack which is also available as a free download and includes the source.

Donn explains the detail of the implementation in his article included with the sample download. Based on the Sensor and Location SDK Skeleton driver example, Donn upgrades this hardware emulating driver to use real hardware based on RS232 communications.

The whole project is an interesting read if only to educate yourself more on the capabilities of Windows 7 – but for all of us tinkerers it facilitates another fun project and adds a bucket load of ideas to the task list. I really recommend it to you!

Event: VS2010 and ALM 17th Dec, London

paulfo — Tue, 08 Dec 2009 08:30:27 GMT

Microsoft and Black Marble are presenting a day exploring the opportunities and benefits of VS2010 in ALM.

You can register for this event by visiting www.blackmarble.com/events
Alternatively you can telephone 01274 841305

Venue: Royal College of Physicians, 11 St Andrews Place, London NW1 4LE

Thursday 17th December 2009
Registration from 9:30am, Event Starts at 10:00am. Lunch at 12:30pm. Event ends at 4:30pm
Visual Studio 2010 is being designed inside and out to give developers and development teams every advantage in getting the next ground-breaking application to market – quickly. The upshot is that your business gets to reap the rewards of tomorrow’s efficiency today.
Microsoft Visual Studio Team System 2010 will deliver new capabilities that embrace the needs of the users in the application lifecycle – from architects to developers, from project managers to testers.
Application Lifecycle Management (ALM) is the coordination of all aspects of software engineering - including the formulation and communication of business and technical requirements, code design and architecture, project tracking, change management, coding, testing, debugging, and release management - by using tools that facilitate and track collaboration among and within work teams.
Application development is one of the most strategic activities in IT. Whether the business goal is improving customer satisfaction, streamlining operations, or extending into a new market, the applications that underpin business initiatives and provide differentiation are critical to success. Application development teams that predictably deliver business-critical applications can help a company maintain a competitive edge in the marketplace and drive top-line growth.
Come along and find out how Microsoft’s Developer Tools are changing as well as how Team Foundation Server, Best Practice and Testing can be implemented to help your business manage its application lifecycle successfully.

PDC 09 attendees get free Win7 laptop

paulfo — Wed, 18 Nov 2009 17:41:36 GMT

Steven Sinofsky announced at PDC09 day 2 keynote, that all PDC 09 attendees would receive a MSFT designed, Acer built, Windows 7 laptop free of charge.

The laptop has a touch screen, full sensor and location functionality, is 64-bit and fully loaded up with Office 2010 beta and lots more.

Designed to enable application developers to get to grips with Windows 7 features, the keynote audience were first stunned and then jubilant at the gift.

To get going on Windows 7 application enhancement take a look here.

Taking your app forward to Win7

paulfo — Wed, 18 Nov 2009 15:09:07 GMT

If you are looking for a concise guide to the features you should consider for your application to shine on Windows 7 look here.

A simple list of the 7 things you could do to rejuvenate your applications and ensure they work will and correctly in the modern world of Windows 7.

Aspire Ferrari One – rocks. A netbook as netbooks should be

paulfo — Tue, 27 Oct 2009 10:24:46 GMT

My latest purchase is an Acer Ferrari One netbook. This is a netbook like no other and the way netbooks should be! It is the same size as the current restricted Atom 11.6” screen netbooks, with 1366x768 res - but this one runs the AMD Athlon X2 L310 processor. Yes this is a dual core, 64-bit, workable screen res netbook baby!

With support for up to 4GB RAM and a 250GB HDD the graphics are provided by the ATiRadeon HD 3200. The Windows Experience Index says it all:

All this for just £399. It is pretty amazing especially when you compare it to the competition. The word on the street is that Intel won’t allow powerful Atoms in the larger screen sized netbooks – protecting full processor laptop sales. This is why they are all Z520 1.2Ghz things – lacking puff.

But even when you look at the ‘proper’ laptops, the Acer Ferrari One is still an amazing buy.

Look at the Sony Vaio TT range. Typical Windows Experience Indices look like this:

Processor = 4.3
Memory (RAM) = 4.9
Graphics = 3.2
Gaming graphics = 4.9
Primary hard disk = 6.2

At best only 0.6 of an index better than the Ferrari One. Yet the TT range sells for over £1400 – 3.5 times the price of the Ferrari One, making the Ferrari One an awesome deal.

The Ferrari One was shipped with Windows 7 Home Premium. I upgraded this to Windows 7 Ultimate by using the Windows Anytime Upgrade feature – allowing you to purchase a new product key and download additional functionality over an internet connection. It took very little time at all, I didn’t time it but it felt like 30mins.

I’m running Office 2010 (internal build), VS2008 Pro, VS2010 Ultimate beta 2, SQL Express 2008 and Expression Studio 3.

Unlike other Atom based netbooks, the Ferrari one doesn’t stall when you have more than one application open. Making it awesome for travel and good enough for every day use (although to be perfect for dev I need a smidge more proc perf).

The Ferrari One has a Synaptics’ multi-gesture touchpad. This appears to only support mouse style functionality (wheel zoom etc) via gestures. Windows 7 doesn’t see it as a multi-touch device :-( Although I have seen mod’ed drivers on the web that apparently enable this functionality. Have to say, if a proper driver for multi-touch was provided the Ferrari One would be ‘the best machine I have ever owned’. And that is some recommendation.

My Ferrari One model doesn’t have the built in 3G support, or Bluetooth. But I have a 3G stick I use across all my machines as needed and I don’t use BT.

I am keeping an eye out for ‘Graphics Boosters’ that use the ATI XGP port on the side of the Ferrari One. In theory at least, these devices extend the graphics capability by as much as x4 performance, and bring support for more than two simultaneous monitors and an HDMI out perfect compliment to the Dolby Home Theatre sound supported on the Ferrari One. It’d be pretty cool to use the Ferrari One in a multi-monitor work station with VS2010 (you can have different IDE windows open on different monitors).

The full spec of my Ferrari One:

Model: ZH6

Processor: AMD Althon 64 X2 dual-core processor L310 (1.20Ghz, 1mb L2 Cache)

LCD: 11.6” HD Acer LED LCD (1366x768)

Graphics: Radeon HD 3200 up to 896mb memory (shared)

Memory: 2GB

Storage: 250GB HDD

Card reader: Multi-in-1

WLAN: Acer Nplify 802.11/b/g/ Draft –N

Web cam: Acer Crystal Eye webcam (0.3mega pixel)

Battery: 6-cell Li-on (appears that I’m getting 5hrs on balanced power management. Spare battery around £90).

Software changes the world – be proud to be part of it

paulfo — Thu, 22 Oct 2009 14:09:18 GMT

One of the joys of working for Microsoft is the real world citizenship. That sounds really corporate, but what I mean is the ability to stand up and do the right thing. Microsoft of course does lots locally and internationally as befits a successful company. But its the ability to do stuff as an individual that helps me fulfil ambitions, help others and feel like I’m making a positive contribution to the world.

For the last few years I’ve been able to support the First Lego League in the UK, and the UK Films for learning community by building and maintaining their websites. These are great activities that enable teachers and students of a wide range of ages to get in the mix with science and technology. Both have a huge effect on those taking part – enabling teachers to teach with flair and originality, and students to learn while having fun and enriching experiences.

Over the summer I’ve been able to do a few fun events with schools and colleges in my area. This has included:

College Technology day. I ran a workshop, repeated three times during the day, on different aspects of software and human interaction including speech controlled robot navigation, direct robot programming, multi-touch on Windows 7 and XNA game development. Nearly 60 students attended during the three workshops, all able to take part hands on building and driving stuff. Fantastic.

High School induction. Initially I was asked to run a robotics workshop as part of the schools activities to welcome its new year six intact. We thought we’d get enough kids interested to run one Saturday morning workshop with 30 student places. It was a surprise and a joy to get a phone call from Mr Cowan – the technology centre manager – to say 145 students had applied to take part. There is only one thing you can do in the face of such enthusiasm – scale out! With the help of Chris Proctor, organiser of the First Lego League in the UK, as well as my UK colleague Daniel Sumner, I was able to borrow more Lego NXT robots enough to allow ten robotic teams. With Mr Cowan’s and the support of senior teaching staff, we were then able to run the workshop twice a day for two consecutive Saturdays and allow all 145 students to take part!

Primary School club. Keen to support my local school, I was able to attend the after school Lego Club with my NXT robots (MS actually paid for them!!). In the brief hour after school, for a whole term, we built and programmed the robots to complete Lego missions on one of the First Lego League challenges. Fantastic fun, for boys and girls aged only 8yo. It never stops to amaze me how our children can rise to any challenge given the opportunity to participate.

My most recent adventure was to present a ‘Microsoft and me’ session for a local careers event for high school students. The event was full of fun with Thrust SSC engineers and a British Airways hostess presenting amongst others. I had a smallish group attend my session – an affect of the standardised lacklustre ITC classes I suspect. We had a great interactive session with discusses covering a range of topics including competitive angles. I enjoyed myself very much and today got some nice feedback from the students eval forms including comments like ‘Why can’t we have an IT teacher like that’ and ‘ Paul Foster is cool’. :-)

My latest project is to try to support a collection of schools in Uganda. They have very little access to computers and therefore the internet, but the teaching staff want to be part of the internet phenomenon and to share their schools stories. By using their mobile phones or dial-up cyber cafes the teachers want to publish what their students are doing. Having got joined up with a UK volunteer recently back from Uganda, thanks to the Films for learning community, I’m now building out a hosted web server that will be able to support not just one school but as many of the local schools as would like to take part. I’m talking to a UK hosting company about their dedicated server products and hope to have the site up and running before Christmas.

Projects like all of these demonstrate just how powerful software is. As Ray Ozzie says, in one of our new employee induction videos, ‘with software, if you can imagine it, you can build it’.

For me, being part of software that does change the world, making a positive contribution to all, makes me proud, excited and humbled.

I am one of many at Microsoft who does this sort of stuff. We are Microsoft, Microsoft is us. We are a force for good, and all the competitor FUD and the rubbish urban myths will not change us.

I’m a PC, and I’m going to change the world for the better.

CROSS POST FROM: http://wotudo.net

Widget development in Windows Mobile 6.5

paulfo — Thu, 22 Oct 2009 08:42:39 GMT

I had two sessions to present at Over The Air 09. The first was all about the new Widget runtime included in Windows Mobile 6.5.

The runtime brings a Microsoft implementation of W3C Widget support to Windows Mobile for the first time. Our implementation is coupled with the launch of our very own mobile application Marketplace – this goes live with the launch of Windows Mobile 6.5 devices on the 6th Oct – allowing Widgets and native code applications (<10mb in size) to be sold directly to Windows Mobile 6 and upward devices.

If you are new to Widgets then here is a summary: The widget ideal is to be able to build mobile applications using web development skills – HTML, Script and AJAX. They are installed on the device and look like a native application with just enough device integration to use soft keys and device state.

So what is in our Widget implementation.

Firstly, we are using the Internet Explorer 6 HTML presentation engine (HTML Control). This is coupled with most of the IE8 script engine. These are brought together in the Widget runtime application called RIAHOST.EXE.

RIAHost adds other stuff, including shell support for devices with touch, soft keys and importantly the Widget object.

The Widget object allows the Widget programmer to reach beyond the Widget into the state of the device. Being able to determine things like signal and battery strength. If the widget is in focus or hidden. As well as many other things.

Widgets are brilliant but I immediately want to do more with my Widgets.

I think, for Widgets to be successful the developer must make them Smart Widgets. Rather than just using them as installed ‘web pages’ Widgets need to know when to start and when to stop doing stuff. The widget that continually calls a web service data update even when it is no longer ‘visible’ to the end user is going to drain the device battery and drive up the users data plan bill!

With the Widget object, we can get hold of when the device is in focus and when it is hidden – allowing us to start or stop doing stuff. We can also tell if the user is roaming or on their home network – a smart widget might do less data traffic when roaming, or at least remind the user of the potential cost while roaming.

Widgets can use a local data persistence. Each field stored can be up to 4000bytes. This allows Widgets to have another trick – the perceived performance trick. Performance exists into states – perceived performance is the performance the user sees on their device. Real performance is how practical it is to make a device really do something. They are two different things, with perceived performance being more important than real performance. A smart Widget developer will ensure the perceived performance of their widget is fast. They can do this by making only asynchronous web service calls and by using only stored state on startup – thus removing any ‘web update’ delay.

What I like even more about the Widget object is that it can be extended. This means over time as more W3C standard interfaces for device service (like geolocation for example) are delivered, then this functionality can be added to WM 6.5 devices. It also means that WM 6.5 devices are open for developers to innovate and deliver some leading edge solutions!

Let me give you a quick run down of how this works.

Are you a COM programmer? Probably not – so let me just tell you something. Windows has all manner of different levels of interoperability, applicable to many different technologies and skill sets. At the fundamental core of Windows is COM. If you can’t extend or subvert Windows functions by any other means you are 99% likely to be able to do it at the COM level.

The Widget object is implemented with support for the IDispatchEX COM interface. IDispatch is the typical COM automation interface. IDispatchEX – or EXpanded – allows a COM object’s IDispatch interface – which normally reports a static list of method calls – to be extended at runtime with more method calls.

In a nut shell, Widget has a base level of functionality, which by using the IDispatchEX functionality we can add more functionality too. Quite literally, your new object’s methods appear on the Widget object. For example, Widget.MyMethod().

How do you do this? Well because Widget has the IDispatchEX, all we have to do is implement a normal IDispatch on our component. This presents method and properties that can be called from our component and that will appear on Widget.

We have to create a CAB installation file for our component – Widgets aren’t allowed to have ActiveX components in their installation package. This does present an initial installation issue, but basically your Widget needs to test for the existence of the dependant component/s and if they aren’t there redirect the user to the CAB URL so that this can be installed on first use. There after, the component/s will be available to the Widget and any other Widgets that want them.

There is one more ‘special bit’. To tell Widget that our component is designed to extend it we have to set a registry key. This can be easily done by including the key definition in the CAB installation file for the component.

[HKEY_LOCAL_MACHINE\Software\Microsoft\Shell\Widgets\ObjectModels\<ObjectName>] "CLSID"="{GUID}“

Where GUID is the GUID of your component control implementation.

A small aside here. My device was running a near final but not final build of Windows Mobile 6.5. When I looked in the device registry to set this key I discovered my ObjectModels was actually BuiltinObjectModels. All the documentation I have seen says it is ObjectModels, but adding the above key to BuiltinObjectModels worked for me :-) Once it worked I didn’t go back to try doing it with a ObjectModels key – sorry pressures of work.

With that done, and the component installed, our Widget can take advantage of our new functionality using script like this:

Var myObj = widget.createObject(“ObjectName”);

myObj.MyMethod();

What might that new functionality be? Well it could be new W3C bits as they are defined. But what about that intellectual property of yours that you’d prefer not to implement in script for the world to easily see. Or many you just need some additional native code features to help exploit device capability.

Using this feature means you can achieve all sorts of exciting stuff with your Widgets – or in fact, your exciting stuff can become the basis for other peoples widgets too.

I’m currently exploring an Augmented Reality framework that could be implemented for Widgets to exploit. This needs some camera integration not available to the Widget script engine. A widget extension object might just be the way to go.

I’m posting my extended widget source code on the downloads section of this site. Please also see the session slides PDF for more detail and do take a look a the WindowsMobile team’s blog – Jorge is doing an awesome job filling in the detail on Widget development.

There are also some helpful projects on Codeplex which provide Widget packaging, emulation and project templates for VS2008 and Expression Web.