CEdit的基类是CWnd
CWnd::Invalidate
void Invalidate( BOOL bErase = TRUE );
Parameters
bErase
Specifies whether the background within the update region is to be erased.
Remarks
Invalidates the entire client area of CWnd. The client area is marked for painting when the next WM_PAINT message occurs. The region can also be validated before a WM_PAINT message occurs by the ValidateRect or ValidateRgn member function.
The bErase parameter specifies whether the background within the update area is to be erased when the update region is processed. If bErase is TRUE, the background is erased when the BeginPaint member function is called; if bErase is FALSE, the background remains unchanged. If bErase is TRUE for any part of the update region, the background in the entire region, not just in the given part, is erased.
Windows sends a WM_PAINT message whenever the CWnd update region is not empty and there are no other messages in the application queue for that window.
CWnd Overview | Class Members | Hierarchy Chart
See Also CWnd::BeginPaint, CWnd::ValidateRect, CWnd::ValidateRgn,::InvalidateRect
CWnd::UpdateWindow
void UpdateWindow( );
Remarks
Updates the client area by sending aWM_PAINT message if the update region is not empty. The UpdateWindow member function sends a WM_PAINT message directly, bypassing the application queue. If the update region is empty, WM_PAINT is not sent.
CWnd Overview | Class Members | Hierarchy Chart
See Also ::UpdateWindow, CWnd::RedrawWindow