WM MSGBOXINIT

This message notifies the owner of the message when a non-modal message box has been created and is currently being displayed.

Syntax

param1
    HWND hwnd;     /* Non-modal window handle. */

param2
    LONG idWindow; /* Window identity of the message box. */

Parameters

hwnd (HWND) - input

Non-modal window handle.

idWindow (LONG) - input

Window identity of the message box.

ulReserved (ULONG) - input

Reserved value, must be 0.

Returns

ulReserved (ULONG) - returns

Reserved value, must be 0.

Remarks

This message is processed within the owner's window procedure when a non-modal WinMessageBox2 is created. It is up to the owner to store the window handle returned by this function. This handle is then used to properly destroy the message box when WM_MSGBOXDISMISS is received or when the parent chooses to destroy it.