BCGControlBar Pro for MFC
BOOL CBCGPToolbarButton::IsHidden ( ) const

Tells whether a button is hidden or not.

Nonzero if a button is hidden (non-visible); otherwise 0.

This function is called to determine whether a toolbar button is visible or not. This function should be used for the mode when the parent toolbar is stretched.

If the button was hidden by CBCGPToolbarButton::SetVisible, use CBCGPToolbarButton::IsVisible.

By default, toolbar buttons are visible. Use the Show() member function to hide or show toolbar buttons.