The following code illustrates creating a secondary window from a dialog template in a resource.

  #define INCL_SW
  #include <os2me.h>

  HWND hwndFrame;

  hwndFrame = WinLoadSecondaryWindow (HWND_DESKTOP, /* Parent window */
                                      HWND_DESKTOP, /* Owner window  */
                                      MyDlgProc,    /* Dialog proc   */
                                      NULL,         /* Module handle */
                                      ID_DIALOG,    /* Resource ID   */
                                      NULL);        /* Create params */
  WinShowWindow (hwndFrame, TRUE);