I would also like to Minimize ArcGIS Explorer. I am creating this extension in .NET
[DllImport("user32.dll")]
private static extern bool SetForegroundWindow(IntPtr hWnd);
private static void BringArcGisExplorerToFront()
{[INDENT]
IntPtr handle = ESRI.ArcGISExplorer.Application.Application.Window.Handle;
SetForegroundWindow(handle);[/INDENT]
}