update string param

xj qian

2024-06-27 df1caf8d568251ca7db8a6edb25d2504e55cc1cd

 jrj/xframe/wobject/xwin.hpp

@@ -120,6 +120,12 @@
   {
      return getKWin()->SetParam((void*)pParam);
   }
   xstring GetParamString()
   {
      if (!GetWinParam())return xstring();
      return xstring(GetWinParam(), true);
   }

   LPARAM GetFrameParam()
   {
      return (LPARAM)getKWin()->GetFrameParam();