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Home » Developing U++ » U++ Developers corner » Using Pen with U++
Re: Using Pen with U++ [message #56452 is a reply to message #56449] Sat, 13 March 2021 12:42 Go to previous messageGo to previous message
Tom1
Messages: 1212
Registered: March 2007
Senior Contributor
Hi,

OK, now I found the reason why the original code produced both WM_MOUSEMOVEs and WM_POINTERUPDATEs for the pen moving: When case WM_POINTERUPDATE: exits with break; , it causes some emulation to result in WM_MOUSEMOVE. However, when WM_POINTERUPDATE exits with return 0L; , there will not be any WM_MOUSEMOVE and the two get processed separately and correctly.

This must be the reason why the latest code works.

Best regards,

Tom
 
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