BCGControlBar Pro for MFC
void CBCGPGridColorItem::EnableOtherButton ( LPCTSTR  lpszLabel,
BOOL  bAltColorDlg = TRUE,
BOOL  bEnable = TRUE 

Shows or hides the "other" button for the drop-down color picker.

Use this method to allow the drop-down color picker either display the "other" button, or hide the "other" button.

The "other" button allows open a color dialog to select a custom color.

lpszLabelThe "other" button text label.
bAltColorDlgIf FALSE, the standard (system) color dialog will be displayed.
bEnableIf TRUE, the "other" button will be displayed; if FALSE, the "other" button will be hidden.