Posted on 2000-04-02
Medium Priority
Last Modified: 2013-11-20
What is the difference between OnDraw and OnPaint functions?
Question by:TCNT
1 Comment

Accepted Solution

krisp earned 150 total points
ID: 2677577
OnDraw() member function is called by the framework to render an image of the document. The framework calls this function to perform screen display, printing, and print preview, and it passes a different device context in each case. There is no default implementation

The framework calls OnPaint()member function when Windows or an application makes a request to repaint a portion of an application's window. It is basically called when a WM_PAINT message is received.An internal WM_PAINT message is sent only once by Windows. After an internal WM_PAINT message is sent to a window by the UpdateWindow member function, no further WM_PAINT messages will be sent or posted until the window is invalidated or until the RedrawWindow member function is called again with the RDW_INTERNALPAINT flag set.

Hope this clarifies u.

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