This example gives the client the focus if it does not already have it.

#define INCL_WININPUT
#include <OS2.H>
#define SYS_MENU 900
HWND hwndFrame;

if (WinQueryFocus(HWND_DESKTOP) !=        /* returns handle of  */
                                          /* window with focus. */
    WinWindowFromID(hwndFrame,FID_CLIENT))
{
    WinSetFocus(HWND_DESKTOP,
    WinWindowFromID(hwndFrame,FID_CLIENT));  /* handle of client */

}