BCGControlBar Pro for MFC
void CBCGPRibbonColorButton::EnableOtherButton ( LPCTSTR  lpszLabel,
LPCTSTR  lpszToolTip = NULL 

Enables and disables the "Other" button, which appears below the regular color buttons.

Call this function to enable or disable "Other" button, which appears below regular color buttons. When the user clicks the "Other" button, it displays a color dialog.

lpszLabelSpecifies the button's text.
lpszToolTipSpecifies tooltip text for the "Other" button.