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Friday, June 06, 2008 12:36 PM

Use a dictionary to help create a mnemonic

I was using a program that was yet another TLA and I wanted to create a mnemonic to help me remember what it was. One of the letters was “k”, so I wanted to find a word that starts with “k” Simple: load a dictionary, search for words starting with “k”
Posted by Calvin_Hsia | 2 Comments
Wednesday, May 28, 2008 12:24 PM

How fast is interop code?

How fast is interop code? If you’re in one kind of code and your calling another, what is the cost of the interop? For example, .Net code can call native C++ code (like Windows APIs) and vice versa. Similarly with Foxpro and C++ code. .Net code is often
Posted by Calvin_Hsia | 17 Comments
Thursday, May 15, 2008 7:42 PM

How to interrupt your code

I received a question: Simply, is there a way of interrupting a vfp sql query once it has started short of closing down the process ? I am running some complex queries on very large datasets which can sometimes take many minutes to complete. Typically,
Posted by Calvin_Hsia | 6 Comments
Friday, April 11, 2008 12:54 PM

Examine .Net Memory Leaks

Writing programs using .Net is very productive. One reason is because much of memory management is “managed” for you. In C, C++ and other “native” languages, if you allocate memory, you’re responsible for freeing it. There were stopgap measures, like
Posted by Calvin_Hsia | 5 Comments
Wednesday, April 02, 2008 4:57 PM

Persist user form size and location settings per session

My prior post ( Create your own Test Host using XAML to run your unit tests ) shows how to create a form and present it to the user. The user can resize and reposition the form, even on a 2 nd monitor. When the user exits the form, we can persist or remember
Posted by Calvin_Hsia | 1 Comments
Thursday, March 27, 2008 9:26 AM

Create your own Test Host using XAML to run your unit tests

A few days ago, somebody came into my office and plopped down a box. It seemed very light. He said that it was a new PC. I thought hmmm…. The box seems empty…Why am I getting a new PC?. Apparently an inventory was made and my current hardware was at the
Posted by Calvin_Hsia | 7 Comments
Wednesday, February 27, 2008 12:12 AM

Find the Executing function's name

Often I want to write the SAME code that will display the name of the currently executing method or function. That way I can just copy/paste the same code into multiple methods. For example, in sub Form1_Load I could put this line: System.Diagnostics.Debug.WriteLine(
Posted by Calvin_Hsia | 3 Comments
Monday, February 25, 2008 9:15 AM

Use Visual Studio Test framework to create tests for your code

While writing software over a period of weeks or months, various components of the software get completed at various times. You’ve tested and you’re satisfied they work, and you move on to develop another feature. Or you might check in the source code
Posted by Calvin_Hsia | 8 Comments
Monday, January 07, 2008 1:35 PM

Uninstall VB6 causes error message: You do not have a license to use this control

I was running out of disk space on one of my machines, so I used my TreeMap program to see where I could delete files to save space. I saw that I still had VB6 on the machine, and I didn’t need it on that machine any more, so I uninstalled it. It's amazing
Posted by Calvin_Hsia | 2 Comments
Wednesday, December 12, 2007 10:54 AM

Use WPF and inline XAML in your Fox, Excel or VB6 applications

My prior post showed how to create XAML WPF and put it on your Winform App. We can go one step further: add XAML to a UserControl, which could then be made into an ActiveX control, which could be hosted by Fox, VB6, or Excel. Start Visual Studio 2008
Posted by Calvin_Hsia | 4 Comments
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Tuesday, December 11, 2007 4:07 PM

Use ElementHost to Add WPF to your Wndows Forms or put your WinForm controls in your WPF app using WindowsFormsHost

Many of you already have a Window Forms application. You can add WPF to your existing application quite easily using the ElementHost class , which can be added as a control to your form. (You can also go the other way: host a Windows Forms control in
Posted by Calvin_Hsia | 6 Comments
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Friday, November 30, 2007 1:10 PM

Use LINQ to Foxpro or any SQL data and display it in a WPF form using DataSetExtensions and DataRowExtensions

In the last post Create your own media browser: Display your pictures, music, movies in a XAML tooltip , we created a query of your local media and displayed it. Today, we'll make a query to my Foxpro picture database of 28,000 pictures/movies. We'll
Posted by Calvin_Hsia | 2 Comments
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Thursday, November 29, 2007 10:46 AM

Create your own media browser: Display your pictures, music, movies in a XAML tooltip

In my prior post , I showed how to use XAML and XAMLReader to create inline XAML to display the results of a query. Today, let's take it a step further: let's create a query of all the media (pictures, movies, music) in your "My Documents" folder and
Posted by Calvin_Hsia | 5 Comments
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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
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