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 of child lParam = (LPARAM) fNext; // next or previous child
The return value is always zero.
If an MDI client window receives any message that changes the activation of its child windows while the active MDI child window is maximized, Windows restores the active child window and maximizes the newly activated child window.
WM_MDIACTIVATE, WM_MDIGETACTIVE
file: /Techref/os/win/api/win32/mess/src/msg25_18.htm, 2KB, , updated: 2000/4/7 11:20, local time: 2024/12/24 22:38,
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