WM_MDIGETACTIVE message

An application sends the WM_MDIGETACTIVE message to a multiple-document interface (MDI) client window to retrieve the handle to the active MDI child window.

#define WM_MDIGETACTIVE                  0x0229

Parameters

wParam

This parameter is not used.

lParam

The maximized state. If this parameter is not NULL, it is a pointer to a value that indicates the maximized state of the MDI child window. If the value is TRUE, the window is maximized; a value of FALSE indicates that it is not. If this parameter is NULL, the parameter is ignored.

Return value

Type: HWND

The return value is the handle to the active MDI child window.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Header	Winuser.h (include Windows.h)

See also

Multiple Document Interface Overview