CMFCToolBarButton::IsVisible
Determines whether the toolbar button is visible.
BOOL IsVisible() const;
Return Value
Nonzero if the toolbar button is visible; otherwise 0.
Remarks
You can show or hide the toolbar button by using the CMFCToolBarButton::SetVisible method. Call the CPane::AdjustSizeImmediate method on the parent toolbar after you call CMFCToolBarButton::SetVisible to recalculate the layout of a parent toolbar.
Requirements
Header: afxtoolbarbutton.h