WM_MDINEXT

An application sends the WM_MDINEXT message to a multiple document interface (MDI) client window to activate the next or previous child window.

WM_MDINEXT 
wParam = (WPARAM) (HWND) hwndChild; // handle to child 
lParam = (LPARAM) fNext;            // next or previous child 
 

Parameters

hwndChild

Value of wParam. Handle to the MDI child window. The system activates the child window that is immediately before or after the given child window, depending on the value of the fNext parameter. If the hwndChild parameter is NULL, the system activates the child window that is immediately before or after the currently active child window.

fNext

Value of lParam. If this parameter is zero, the system activates the next MDI child window and places the child window identified by the hwndChild parameter behind all other child windows. If this parameter is nonzero, the system activates the previous child window, placing it in front of the child window identified by hwndChild.

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 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_MDIACTIVATE, WM_MDIGETACTIVE