This post originated from an RSS feed registered with .NET Buzz by Peter G Provost. Original Post: Getting the Desktop Window from .NET Feed Title: Peter Provost's Geek Noise Feed URL: /error.aspx?aspxerrorpath=/Rss.aspx Feed Description: Technology news, development articles, Microsoft .NET, and other stuff... Latest .NET Buzz Posts Latest .NET Buzz Posts by Peter G Provost Latest Posts From Peter Provost's Geek Noise

I don't organize my Windows desktop like most people. I like to have my icons in rows not columns. So I get very annoyed anytime something on the system causes a desktop refresh. Suddenly all of my icons are back where Microsoft decided they should be instead of where I decided they should be.

I've been thinking about writing an app to do this for a few years, but I never got around to starting one until today.

I decided to create a solution spike to learn a few things that I didn't know already. First problem? How do I talk to the desktop window from .NET.

As far as I can tell you can't do it using Windows Forms... you have to use P/Invoke. So I created a quick little WinForms app to test it out.

I created a Form and added a button to it. Then I added the following event handler.

[DllImport("user32.dll", EntryPoint="SendMessage")] 
public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam); 
[DllImport("user32.dll",EntryPoint="FindWindow")]
private static extern int FindWindow(string _ClassName, string _WindowName);
[DllImport ("user32.dll")]
public static extern IntPtr GetWindow( IntPtr handle, int cmd );
private void button1_Click(object sender, System.EventArgs e)
{
  const int LVA_DEFAULT = 0x0000;
  const int LVM_FIRST = 0x1000; // ListView messages
  const int LVM_ARRANGE = (LVM_FIRST + 22);
  const int GW_CHILD = 5;
  int tmp = FindWindow( "ProgMan", null );
  IntPtr handle = new IntPtr(tmp);
  handle = GetWindow( handle, GW_CHILD );
  handle = GetWindow( handle, GW_CHILD );
  SendMessage( handle, LVM_ARRANGE, LVA_DEFAULT, 0 );
}

Success! The desktop arranged itself.

Next task... figuring out how to actually arrange icons in a list view.