The WM_INITDIALOG message is sent to the dialog box procedure immediately before a dialog box is displayed. Dialog box procedures typically use this message to initialize controls and carry out any other initialization tasks that affect the appearance of the dialog box.
WM_INITDIALOG hwndFocus = (HWND) wParam; // handle of control to receive focus lInitParam = lParam; // initialization parameter
The dialog box procedure should return TRUE to direct Windows to set the keyboard focus to the control given by hwndFocus. Otherwise, it should return FALSE to prevent Windows from setting the default keyboard focus.
The control to receive the default keyboard focus is always the first control in the dialog box that is visible, not disabled, and that has the WS_TABSTOP style. When the dialog box procedure returns TRUE, Windows checks the control to ensure that the procedure has not disabled it. If it has been disabled, Windows sets the keyboard focus to the next control that is visible, not disabled, and has the WS_TABSTOP.
An application can return FALSE only if it has set the keyboard focus to one of the controls of the dialog box.
CreateDialogIndirectParam, CreateDialogParam, DialogBoxIndirectParam, DialogBoxParam, SetFocus
file: /Techref/os/win/api/win32/mess/src/msg24_26.htm, 3KB, , updated: 2006/6/1 11:26, local time: 2024/12/23 05:26,
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