BCGControlBar Pro for MFC
static BOOL CBCGPToolbarComboBoxButton::IsCenterVert ( )
inlinestatic

Tells whether the button is centered, or aligned at the top of toolbar.

Returns
TRUE if the button is centered, FALSE if the button is aligned at the top.

Use this function to determine whether the combo box button is centered, or aligned at the top of toolbar.

You can toggle the current alignment by SetCenterVert().