MFC to achieve dynamic interface, use the BitBlt draw pictures appear after delete pictures to produ-CodePudding

The code is as follows:
PDC - & gt; BitBlt (ax * 10, ay * 10, bitmap. BmWidth, bitmap. BmHeight, & amp; DcMemory, 0, 0, SRCCOPY);
Sleep (500);
PDC - & gt; BitBlt (ax * 15, ay * 10, bitmap. BmWidth, bitmap. BmHeight, & amp; DcMemory, 0, 0, SRCCOPY);
DcMemory. SelectObject (hOldBitmap);
DcMemory. DeleteDC ();
CBMP. DeleteObject ();
Just want to ask how to eliminate has emerged the first figure

CodePudding user response:

PDC - & gt; BitBlt (ax * 10, ay * 10, bitmap. BmWidth, bitmap. BmHeight, & amp; DcMemory, 0, 0, SRCCOPY);
Fall down? Should
PDC - & gt; BitBlt (0, 0, bitmap bmWidth, bitmap. BmHeight, & amp; DcMemory, ax * 10 * 10, SRCCOPY);