static long /*int*/ windowProc( long /*int*/ hwnd, long /*int*/ msg, long /*int*/ wParam, long /*int*/ lParam) { switch ((int) /*64*/ msg) { case OS.WM_UPDATEUISTATE: /* * In XULRunner 17, calling the default windowProc for WM_UPDATEUISTATE message * terminates the program. Workaround is to prevent the call to default windowProc. */ return 0; case OS.WM_ERASEBKGND: RECT rect = new RECT(); OS.GetClientRect(hwnd, rect); OS.FillRect(wParam, rect, OS.GetSysColorBrush(OS.COLOR_WINDOW)); break; } return OS.CallWindowProc(MozillaProc, hwnd, (int) /*64*/ msg, wParam, lParam); }