The following code illustrates registering a graphic button window class.

 #define INCL_SW
 #include <os2me.h>

 HWND hwndFrame;

 WinRegisterGraphicButton();      /* Register a graphic button control */

                                  /* Create a Secondary Window         */
 hwndFrame = WinLoadSecondaryWindow(HWND_DESKTOP,
                                     HWND_DESKTOP,
                                     MyDlgProc,
                                     NULL,
                                     ID_DIALOG,
                                     NULL);