CMFCToolBar::InvalidateButton
Invalidates the client area of the toolbar button that exists at the provided index.
CMFCToolBarButton* InvalidateButton(
int nIndex
);
Parameters
- [in] nIndex
The zero-based index of the button in the toolbar.
Return Value
A pointer to the CMFCToolBarButton object that exists at the provided index or NULL if no such object exists.
Remarks
The framework calls this method when it updates the client area that is associated with a toolbar button. It calls the CWnd::InvalidateRect method with the client rectangle of the CMFCToolBarButton object that exists at the provided index.
Requirements
Header: afxtoolbar.h