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Thanks for the points. I had seen that property but had (wrongly) assumed that it wouldn't be set to false when the handle was destroyed. The documentation says that it returns true if CreateHandle has been called, but makes no mention of it being Destroyed.<br />
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Just shows, test the code rather than relying on the documentation :-)
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Thanks for the points. I had seen that property but had (wrongly) assumed that it wouldn't be set to false when the handle was destroyed. The documentation says that it returns true if CreateHandle has been called, but makes no mention of it being Destroyed.

Just shows, test the code rather than relying on the documentation :-)

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Invoke or BeginInvoke cannot be called on a control until the window handle has been created.<br />
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This message bugs me. &nbsp;<br />
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To avoid cross threading exceptions in my application I use BeginInvoke to update the StatusBar of my application. &nbsp;The thread that updates the status bar does not know if it has been given a window handle yet, and checking for the existence of a handle tosses an exception. &nbsp;If you write directly to a control, before it has a handle, no problem. &nbsp;It is only when using method invocation that the window handle is necessary.<br />
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Does anyone have a design pattern to avoid this problem?<br />
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Thanks,<br />
Gerry
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Invoke or BeginInvoke cannot be called on a control until the window handle has been created.

This message bugs me.  

To avoid cross threading exceptions in my application I use BeginInvoke to update the StatusBar of my application.  The thread that updates the status bar does not know if it has been given a window handle yet, and checking for the existence of a handle tosses an exception.  If you write directly to a control, before it has a handle, no problem.  It is only when using method invocation that the window handle is necessary.

Does anyone have a design pattern to avoid this problem?

Thanks,
Gerry

How to avoid BeginInvoke before a handle has been created

C# is an object-oriented programming language created in conjunction with Microsoft’s .NET framework. Compilation is usually done into the Microsoft Intermediate Language (MSIL), which is then JIT-compiled to native code (and cached) during execution in the Common Language Runtime (CLR).