WM_MDIMAXIMIZE

An application sends the WM_MDIMAXIMIZE message to a multiple document interface (MDI) client window to maximize an MDI child window. The system resizes the child window to make its client area fill the client window. The system places the child window's window menu icon in the rightmost position of the frame window's menu bar, and places the child window's restore icon in the leftmost position. The system also appends the title bar text of the child window to that of the frame window.

WM_MDIMAXIMIZE 
wParam = (WPARAM) (HWND) hwndMax; // handle to child to maximize 
lParam = 0;                       // not used; must be zero 
 

Parameters

hwndMax

Value of wParam. Handle to the MDI child window to be maximized.

Return Values

The return value is always zero.

Remarks

If an MDI client window receives any message that changes the activation of its child windows while the currently active MDI child window is maximized, the system restores the active child window and maximizes the newly activated child window.

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in winuser.h.

See Also

Multiple Document Interface Overview, Multiple Document Interface Messages, WM_MDIRESTORE