CMFCToolBarButton::IsHidden
Determines whether the button is hidden.
BOOL IsHidden() const;
Return Value
Nonzero if the button is hidden (invisible); otherwise 0.
Remarks
The framework calls this method when the parent toolbar is stretched to determine whether the toolbar button is visible.
If you set the button to be invisible by using the CMFCToolBarButton::SetVisible method, use CMFCToolBarButton::IsVisible to determine whether the toolbar button is visible.
By default, all toolbar buttons are visible. Use the CMFCToolBarButton::Show method to hide or show toolbar buttons.
Requirements
Header: afxtoolbarbutton.h