PE_BUFFERWARNING - Microsoft Windows Pen API Programmer's Reference

Microsoft Windows Pen API Programmer's Reference

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PE_BUFFERWARNING

Generated by the pen driver component of the system when the input queue is approximately half full. When an application receives PE_BUFFERWARNING, it should immediately call GetPenInput to drain the input queue. Submessage of WM_PENEVENT.

Parameters
wParam

PE_BUFFERWARNING.

lParam

Extra information encapsulating a reference to the event and the HPCM that generated it. Applications can use the EventRefFromWpLp and HpcmFromWpLp macros to retrieve these values.

Comments
If an application receives this message, it has fallen behind in processing the input. The buffer is in danger of overflowing. The application should repeatedly call GetPenInput to gather the unprocessed pen input.

See Also
GetPenInput, WM_PENEVENT

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