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Thursday, March 13, 2008 1:23 PM

Compress and timestamp your pictures to gain disk space

I was running out of space again on my notebook. As years go by, digital cameras can take pictures with more megapixels, but that means they take up more space. Thus my pictures from 10 years ago are much smaller than this year’s. Since I have multiple
Posted by Calvin_Hsia | 3 Comments
Thursday, October 11, 2007 10:55 PM

Resize your pictures for your phone or pocket pc

I have many digital pictures, and I'd like to put some of my favorites on my SmartPhone . However the files are much higher resolution than the device's display. This means the files take a lot more memory on the phone, and they take longer to process.
Posted by Calvin_Hsia | 9 Comments
Monday, October 08, 2007 12:13 PM

Generate and run PowerShell scripts dynamically

In my prior post Use new XML Features of VB to generate dynamic scripts and text files , we generated a simple batch file. It’s difficult to modify the registry or manipulate a COM object PowerShell scripts allow you to manipulate files, registry and
Posted by Calvin_Hsia | 1 Comments
Monday, August 06, 2007 12:45 PM

Find which DLLs in your system are rebased

You can use CreateToolhelp32Snapshot and its family of functions to enumerate the running processes on your machine, including the modules loaded by each process My prior post ( DLL Image base addresses are the same in XP, different on Vista ) described
Posted by Calvin_Hsia | 5 Comments
Tuesday, May 29, 2007 3:16 PM

Help->About->System Info doesn't work on Vista

A customer (thanks Grady!) reported that choosing Help->About->System Info on Vista causes a MessageBox to display “Microsoft System Info cannot be found or run.” Why is that? Simple investigation: run Regedit on WinXP and Vista to inspect this
Posted by Calvin_Hsia | 3 Comments
Wednesday, May 16, 2007 5:42 PM

Allowing Optional parameters in your COM objects

It’s simple to create a VFP object that can be used within other applications. I show how useful it is in Blogs get 300 hits per hour: Visual FoxPro can count. That sample builds the T1.C1 object that uses methods with multiple parameters. T1.C1 is a
Posted by Calvin_Hsia | 3 Comments
Saturday, May 05, 2007 9:13 PM

Create your own Flip Task Bar with live thumbnails using Vista Desktop Window Manager DWM

The sample below uses Desktop Window Manager under Windows Vista with Aero to get dynamic live thumbnails of running applications. If a movie is playing in Windows Media Player, it will play in the thumbnail too! EnumChildWindows or EnumWindows is used
Posted by Calvin_Hsia | 4 Comments
Thursday, May 03, 2007 4:50 PM

Vista Aero DWM seems to optimize out GDI paint calls

In this post: Foxpro Menu items, combo boxes not refreshing selected item under Aero in Vista I describe a problem in Foxpro where menu and list items that are supposed to be non-selected aren’t painted correctly. I described a workaround: call the GdiSetBatchLimit
Posted by Calvin_Hsia | 7 Comments
Wednesday, May 02, 2007 11:21 AM

Fun with Vista Aero using the DwmExtendFrameIntoClientArea

You can have a little fun with Vista Aero using the DwmExtendFrameIntoClientArea function. This will cause the VFP border to paint the glass effect around the fox border DECLARE integer DwmExtendFrameIntoClientArea IN dwmapi integer hWnd , string @ daMargins
Posted by Calvin_Hsia | 2 Comments
Tuesday, May 01, 2007 2:30 PM

Windows Vista Aero BorderStyle Paint problem as non Administrator

Above is an image of an inner form (from the C++ project below) before and after I dragged it a little bit up and left to obscure the title bar, then back to the original position. You can see the title, icon, close/minimize buttons were not painted correctly.
Posted by Calvin_Hsia | 8 Comments
Friday, April 13, 2007 2:29 PM

Add a manifest to control your application Vista UAC behavior

Try this on Windows XP or Vista (I don’t remember if manifests are allowed on Win2000: can someone confirm please? Thanks) Start Notepad, then choose File->Open and navigate to c:\windows\system32\notepad.exe and click Open. Hit Ctrl-F to find the
Posted by Calvin_Hsia | 11 Comments
Thursday, April 05, 2007 1:26 PM

Why doesn't Microsoft Excel Spreadsheet control work?

We received a bug report: Steps to Reproduce : Open the form designer by creating a new form. Insert a an ActiveX control and select "Microsoft Office Spreadsheet 11.0" Actual Results : OLE error code 0x80040202: Unknown COM status code. Expected Results
Posted by Calvin_Hsia | 5 Comments
Monday, February 26, 2007 10:43 AM

How to log application API calls using import module addresses

Let’s log all the calls that Excel makes to open or create a file. Start Visual Studio (any version), choose File->Open->Projects. In the dialog, change the “Files of Type” to “Executable Files (*.exe)” Choose any application like Excel: C:\Program
Posted by Calvin_Hsia | 5 Comments
Thursday, December 07, 2006 4:58 PM

Customer question: what does the crash call stack mean

A customer asks: I read your article "Intentionally crash your program". I have some questions that I hope you can answer. When a fatal exception happens, foxpro display the calling stacks. How to read the calling stacks? A calling stack seems to contain
Posted by Calvin_Hsia | 1 Comments
Thursday, September 28, 2006 11:24 AM

Play movies with an ActiveX control

I’ve been using Canon Powershot cameras for years, and they take movies in AVI format as well as being a good camera. I store my photos and movies in the same folders, and use the same database to store them. To display the movies, I add a Windows Media
Posted by Calvin_Hsia | 0 Comments
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