RE: GetDIBits() return values

Are you absolutely positive you don't call anything that sets the Windows
error before you read it?

I spent a few days trying to figure out why a certain bit of code always
logged windows error 2, but I couldn't get an error when run in the
debugger.  After a while, I realized that the logging macros were resetting
the error code to either 0 or 2.  The error 2 came from trying to write to
the debugger when it wasn't attached.

Just something to look for.


Bryan.

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Brian
Hook
Sent: Wednesday, January 04, 2006 3:42 PM
To: [email protected]
Subject: [GD-Windows] GetDIBits() return values

On occasion GetDIBits() returns 0, indicating failure, but 
GetLastError() returns 0, indicating success.  The dimensions I pass 
in are scan start=0,scanlines=12.  Everything seems to work fine, but 
very occasionally (< 1% of the time) I get a return value that != 12.

Anyone know under what conditions this might happen?

Thanks,

Brian



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