DefMDIChildProc info  Overview  Group

The DefMDIChildProc function provides default processing for any window message that the window procedure of a multiple document interface (MDI) child window does not process. A window message not processed by the window procedure must be passed to the DefMDIChildProc function, not to the DefWindowProc function.

LRESULT DefMDIChildProc(

Parameters

hWnd

Identifies the MDI child window.

uMsg

Specifies the message to be processed.

wParam

Specifies additional message-specific information.

lParam

Specifies additional message-specific information.

Return Values

The return value specifies the result of the message processing and depends on the message.

Remarks

The DefMDIChildProc function assumes that the parent window of the MDI child window identified by the hWnd parameter was created with the MDICLIENT class.

When an application’s window procedure does not handle a message, it typically passes the message to the DefWindowProc function to process the message. MDI applications use the DefFrameProc and DefMDIChildProc functions instead of DefWindowProc to provide default message processing. All messages that an application would usually pass to DefWindowProc (such as nonclient messages and the WM_SETTEXT message) should be passed to DefMDIChildProc instead. In addition, DefMDIChildProc also handles the following messages:

See Also

DefFrameProc, DefWindowProc, WM_CHILDACTIVATE, WM_GETMINMAXINFO, WM_MENUCHAR, WM_MOVE, WM_SETFOCUS, WM_SETTEXT, WM_SIZE, WM_SYSCOMMAND

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