CWnd::OnWindowPosChanging

afx_msgvoidOnWindowPosChanging(WINDOWPOS*lpwndpos);

Parameters

lpwndpos

Points to a WINDOWPOS data structure that contains information about the window’s new size and position.

Remarks

The framework calls this member function when the size, position, or Z-order is about to change as a result of a call to the member function or another window-management function.

An application can prevent changes to the window by setting or clearing the appropriate bits in the flags member of the WINDOWPOS structure.

For a window with the WS_OVERLAPPED or WS_THICKFRAME style, the default implementation sends a message to the window. This is done to validate the new size and position of the window and to enforce the CS_BYTEALIGNCLIENT and CS_BYTEALIGN client styles. An application can override this functionality by not calling its base class.

Note   This member function is called by the framework to allow your application to handle a Windows message. The parameters passed to your function reflect the parameters received by the framework when the message was received. If you call the base-class implementation of this function, that implementation will use the parameters originally passed with the message and not the parameters you supply to the function.

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See Also   CWnd::OnWindowPosChanged,