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https://cygwin.com/pipermail/cygwin/2007-April/157068.html winTopLevelWindowProc - BitBlt failed: The handle is invalid. the handle bitblt failed invalid https://jeffpar.github.io/kbarchive/kb/087/Q87494/ Q87494: BUG: BitBlt() Bitmap on VGA Display Causes GP Fault | KnowledgeBase Archive An Archive of Early Microsoft KnowledgeBase Articles