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In 32-bit Windows, does it matter if you use signed (LONG) or unsigned (DWORD) integer variables to store handles?
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The only time you might get in trouble using a DWORD is when an API function can return %INVALID_HANDLE_VALUE, which the WIN32API.INC file defines as negative one. If you use a DWORD for a variable that contains a handle and Windows assigns INVALID_HANDLE_VALUE to it, it will appear to your program to be %MAXDWORD (positive 4.2 billion) instead of negative one.
-- Eric
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