TCN_SELCHANGING Z6VI4K

The TCN_SELCHANGING notification message notifies a tab control s parent window that the currently selected tab is about to change. This message is sent in the form of a WM_NOTIFY message.

TCN_SELCHANGING

idTabCtl = (int) LOWORD(wParam);

lpnmhdr = (LPNMHDR) lParam;

Parameters

idTabCtl

Specifies the child window identifier of the tab control.

lpnmhdr

Pointer to an NMHDR99J.0 structure. The hwndFrom member is the handle of the tab control. The idFrom member is the child window identifier of the tab control. The code member is TCN_SELCHANGING.

Return Values

Returns TRUE to prevent the selection from changing or FALSE to allow the selection to change.

Remarks

To determine the currently selected tab, use the TabCtrl_GetCurSel macro.