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What is the difference between OnDraw and OnPaint functions?
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TCNT
Asked:
TCNT
1 Solution
 
krispCommented:
Hi TCNT,
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.
cheers.
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