CMFCToolBarButton::IsLocked
Determines whether the button is on a locked (non-customizable) toolbar.
BOOL IsLocked() const;
Return Value
Nonzero if the button is on a locked toolbar; otherwise 0.
Remarks
The framework calls this method to determine whether the user can customize the toolbar button by using drag-and-drop or edit operations. Set the locked attribute on the parent toolbar by using the CMFCToolBar::LoadToolBar method. The framework passes the value of this attribute to the constructor of each toolbar button (CMFCToolBarButton Class) that it inserts into the parent toolbar.
Requirements
Header: afxtoolbarbutton.h