This example shows how to query a window's process and use that information to add a switch entry window.

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

HWND     hwndFrame;           /* window handle. */
SWCNTRL  swctl;
PID      pid;
TID      tid;
HSWITCH  hsw;
char     szTitle[] = "app.exe";

  WinQueryWindowProcess( hwndFrame, &pid, &tid);
  swctl.hwnd  = hwndFrame;
  swctl.idProcess = pid;
  strcpy( swctl.szSwtitle, szTitle);
  hsw = WinAddSwitchEntry( &swctl);