Call this function to set the style of check boxes in the checklist box.
void SetCheckStyle(
   UINT nStyle 
);
Parameters
- nStyle
 Determines the style of check boxes in the checklist box.
Remarks
Valid styles are:
- BS_CHECKBOX 
- BS_AUTOCHECKBOX 
- BS_AUTO3STATE 
- BS_3STATE 
For information on these styles, see Button Styles.
Requirements
Header: afxwin.h