BCGControlBar Pro for MFC
void CBCGPRibbonBar::EnableKeyTips ( BOOL  bEnable = TRUE,
UINT  nDelay = 200 

Enables or disables key tips feature for the Ribbon control.

Use this method to enable or disable key tips for the Ribbon control. When this feature is enabled, key tips are displayed when the user has pressed Alt or F10 button. When the user has pressed Alt key, key tips are displayed with some delay (it's needed to allow shortcuts to be executed and do not interfere with other Alt combinations).

bEnableSpecify TRUE to enable key tips feature.
nDelaySpecify delay (in milliseconds) before displaying the Ribbon key tips.