diff --git a/stdwndclass_windows.go b/stdwndclass_windows.go
index b2b82fd..f720051 100644
--- a/stdwndclass_windows.go
+++ b/stdwndclass_windows.go
@@ -16,7 +16,7 @@ var (
 )
 
 func stdWndProc(hwnd _HWND, uMsg uint32, wParam _WPARAM, lParam _LPARAM) _LRESULT {
-	sysData := getSysData(hwnd)
+//	sysData := getSysData(hwnd)
 	switch uMsg {
 	case _WM_COMMAND:
 		id := wParam.LOWORD()
@@ -32,10 +32,10 @@ func stdWndProc(hwnd _HWND, uMsg uint32, wParam _WPARAM, lParam _LPARAM) _LRESUL
 		// TODO
 		return 0
 	case _WM_CLOSE:
-		if sysData.closing != nil {
+/*		if sysData.closing != nil {
 			sysData.closing <- struct{}{}
 		}
-		return 0
+*/		return 0
 	default:
 		r1, _, _ := defWindowProc.Call(
 			uintptr(hwnd),