What could make GetCursorPos return incorrect coordinates of {0,0} ?

Posted by Dave Moore on Stack Overflow See other posts from Stack Overflow or by Dave Moore
Published on 2010-04-15T18:41:55Z Indexed on 2010/04/15 18:43 UTC
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win32

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Windows

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winforms

We are seeing bad behavior in an application when it runs on Server 2008 (not R2). This is a WinForms application, and Control.MousePosition is returning {0,0} no matter where the mouse is on the screen... Control.MousePosition just makes a P/Invoke call to Win32 api GetCursorPos().

There is a control in our library that calls SetWindowsHookEx to hook WH_CALLWNDPROCRET for our entire process. I'm suspicious of this code, but tracing statements show that we're getting in + out of that hook cleanly.

What else should I be looking for?

Thanks, Dave

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