BCGControlBar Pro for MFC
BOOL CBCGPToolbarComboBoxButton::SelectItem ( DWORD_PTR  dwData)

Searches the list of items of a combo box button and selects one of them according to the specified value.

Nonzero if the item was found and selected; otherwise 0.

Searches for an item in the list box of a combo box by data, and if the item is found, selects it in the list box and copies its text to the edit control.

dwDataSpecifies the value associated with an item to search for.