BCGControlBar Pro for MFC
void CBCGPCheckComboBox::SetState ( ULONGLONG  nState,
BOOL  bRedraw = TRUE 

Sets items state by mask.

Call this method to set the combobox items state by mask. For example, calling SetState(0x3) checks first 2 items and unchecks the rest of the items. Please note that this method works correctly only if the combobox has less than 64 items.

nStateSpecifies the items state.
bRedrawSpecifies whether a control should be redrawn.