BCGControlBar Pro for MFC
virtual void CBCGPRibbonBar::EnableMinimizeButton ( BOOL  bEnable = TRUE,
BOOL  bRecalc = TRUE 

Shows or hides a minimize button.

Call this function to enable or disable minimize button. This button is displayed at the right top corner of Ribbon Control and is used to minimize or restore Ribbon Control.

bEnableTRUE- display minimize button, FALSE - hide minimize button.
bRecalcSet this parameter to TRUE to relaculate the window layout.