This function returns the checked state of the button control specified.

#define INCL_WINWINDOWMGR
#define INCL_WINBUTTONS
#include <OS2.H>

#define IDM_BUTTONA 900

HWND hwndDlg;
USHORT ChkState;


ChkState = WinQueryButtonCheckstate(hwndDlg,
                                   IDM_BUTTONA);

switch (ChkState)
{


  case 0:

     /*  Unchecked  */
   break;
  case 1:

     /*  Checked  */
     break;
  case 2:

     /*  Indeterminate. */
     break;
}