public static IShellFolder GetDesktopFolder()
{
IntPtr ptrRet;
ShellApi.SHGetDesktopFolder(out ptrRet);
System.Type shellFolderType = System.Type.GetType("ShellLib.IShellFolder");
Object obj = Marshal.GetTypedObjectForIUnknown(ptrRet, shellFolderType);
IShellFolder ishellFolder = (IShellFolder)obj;
return(ishellFolder);
}