void CClassroomRecordingSystemDlg::OnPaint() void CClassroomRecordingSystemDlg::OnPaint()
阅读背景：
mfc基于对话框用橡皮筋类画矩形框，画出来的是一片不连续的矩形框，这是怎么回事
来源：互联网
void CClassroomRecordingSystemDlg::OnPaint() void CClassroomRecordingSystemDlg::OnPaint()
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