BCGControlBar Pro for MFC
void CBCGPGroup::SetGroupControlsVisible ( BOOL  bVisible,
LPCTSTR  lpszPrompt = NULL,
COLORREF  clrPrompt = CLR_DEFAULT 
)

Specifies whether controls located inside the group are visible.

Parameters
bVisibleTRUE to show, FALSE to hide group controls.
lpszPromptA text prompt appearing in the middle of the group box when group controls are hidden. Can be NULL.
clrPromptA color of the text prompt.