This example uses WinEnableControl to enable a dialog control if it is currently disabled.

#define INCL_WINWINDOWMGR       /* Window Manager Functions     */
#include <os2.h>

HWND    hwndDlg;        /* dialog window                        */
MPARAM  mp1;            /* Parameter 1                          */
USHORT  usId;           /* dialog control id                    */


if (!WinIsControlEnabled(hwndDlg, usId))
   WinEnableControl(hwndDlg, usId, TRUE);