I had Some doubt in my Windows app

Create DWORD(32-bit) "DefaultDropEffect"
value="4" - create Shorcut for drag and drop
value="0" - normal

HKEY_CLASSES_ROOT/*/DefaultDropEffect


C# Code for creat shortcut link for mouse drag and drop

CreateShortCut(4); // Function Cll

#region "Drag And Drop"
       private void CreateShortCut(int iAction)
       {
               RegistryKey registryKey = Registry.ClassesRoot.CreateSubKey("*");
               if (registryKey == null)
               {
                   throw new Exception("CreateSubKey failed");
               }
               if (iAction != 0)
               {
                   registryKey.SetValue("DefaultDropEffect", iAction, RegistryValueKind.DWord);
               }
               else
               {
                   registryKey.DeleteValue("DefaultDropEffect", false);
               }

               registryKey.Close();

               registryKey = Registry.ClassesRoot.CreateSubKey("AllFilesystemObjects");
               if (registryKey == null)
               {
                   throw new Exception("CreateSubKey failed (AllFilesystemObjects)");
               }

               if (iAction != 0)
               {
                   registryKey.SetValue("DefaultDropEffect", iAction, RegistryValueKind.DWord);
               }
               else
               {
                   registryKey.DeleteValue("DefaultDropEffect", false);
               }

           }

       #endregion