Force Form to Top Level Focus

My .NET Compact Framework application requires that, from time to time, the user gets audibly alerted and a messagebox or form is displayed (using the System.Threading.Timer). Unfortunately, I have been unable to get my Form to display over the home screen. I have tried:

this.Focus();
this.Visible = true;
this.Show();

All in various combinations. I've found a few solutions about this on the web (I haven't tried either yet).

(1)
[DllImport("coredll.dll")]
public static extern bool SetForegroundWindow(IntPtr hWnd );
[DllImport("coredll")]
public static extern IntPtr FindWindow(string className, string wndName);
this.Show();
IntPtr hwnd = FindWindow(null, this.Text);
SetForegroundWindow(hwnd );

A full example can be found here.

(2)
If you need to fix your form at the top of the z-order, then rather than continually pulling the window to the front, use SetWindowPos (you'll need to P/Invoke) with the HWND_TOPMOST flag. This will keep your form at the top even if it loses focus. See the code for OpenNETCF.Win32.Win32Window for P/Invoke declaration:-http://vault.netcf.tv/VaultService/VaultWeb/GetFile.aspx?repid=2&path=%24%2fSDF%2fOpenNETCF.Windows.Forms%2fWin32%2fWin32Window.cs&version=2(username guest, password guest)