Source code for catchstraywindows.cs

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using System;
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using System.Collections.Generic;
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using System.Runtime.InteropServices;
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using System.Text;
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using System.Windows.Forms;
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namespace RobvanderWoude
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{
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	class CatchStrayWindows
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	{
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		static readonly string progver = "1.00";

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		static readonly int screenwidth = Screen.PrimaryScreen.WorkingArea.Width;

		static readonly int screenheight = Screen.PrimaryScreen.WorkingArea.Height;

```
 
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		static bool includeminimized = false;
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		static bool includeanonymous = false;
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		static int Main( string[] args )
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		{
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			// Set console encoding to UTF-8
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			Console.OutputEncoding = System.Text.Encoding.UTF8;

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			#region Parse Command Line
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			foreach ( string arg in args )
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			{
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				switch ( arg.ToUpper( ) )
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				{
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					case "/?":
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						return ShowHelp( );
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					case "/IA":
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						if ( includeanonymous )
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						{
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							return ShowHelp( "Duplicate command line switch /IA" );

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						}
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						includeanonymous = true;
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						break;
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					case "/IM":
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						if ( includeminimized )
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						{
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							return ShowHelp( "Duplicate command line switch /IM" );

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						}
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						includeminimized = true;
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						break;
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					default:
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						return ShowHelp( "Invalid command line argument \"{0}\"", arg );

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				}
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			}
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			#endregion Parse Command Line
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			// List active windows
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			GetDesktopWindowHandlesAndTitles( out windows );

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			#region Restore Minimized Windows
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			// First restore/maximize any minimized window(s) that should be included

			foreach ( IntPtr handle in windows.Keys )

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			{
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				if ( windows[handle] != "(no title)" || includeanonymous )

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				{
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					if ( !IsIconic( handle ) || includeminimized )

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					{
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						string debugmessage = string.Format( "Maximized \"{0}\"", windows[handle] );

						//string debugmessage = string.Format( "Restored \"{0}\"", windows[handle] );

						if ( IsIconic( handle ) && includeminimized )

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						{
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							Console.WriteLine( debugmessage );

							ShowWindow( handle, SW_SHOWMAXIMIZED );

							//ShowWindow( handle, SW_SHOWMAXIMIZED );

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						}
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					}
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				}
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			}
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			#endregion Restore Minimized Windows
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			#region Move Windows to Primary Monitor

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			// Next move the window(s) to the primary monitor

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			int count = 0;
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			foreach ( IntPtr handle in windows.Keys )

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			{
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				if ( windows[handle] != "(no title)" || includeanonymous )

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				{
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					if ( !IsIconic( handle ) || includeminimized )

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					{
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						RECT rect = new RECT( );
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						if ( GetWindowRect( handle, ref rect ) )

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						{
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							if ( ( rect.Left > screenwidth || rect.Right < 20 || rect.Top > screenheight || rect.Bottom < 20 ) && ( rect.Left != 0 && rect.Top != 0 ) )

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							{
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								int width = rect.Right - rect.Left;

								int height = rect.Bottom - rect.Top;

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								bool repaint = true;
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								string debugmessage = string.Format( "Moved \"{0}\" from ({1},{2}) to ({3},{4})", windows[handle], rect.Left, rect.Top, 0, 0 );

								if ( MoveWindow( handle, 0, 0, width, height, repaint ) )

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								{
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									Console.WriteLine( debugmessage );

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									count += 1;
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								}
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							}
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						}
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					}
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				}
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			}
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			#endregion Move Windows to Primary Monitor

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			return count;
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		}
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		#region Check If Minimized
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		[DllImport( "user32.dll" )]
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		[return: MarshalAs( UnmanagedType.Bool )]

		static extern bool IsIconic( IntPtr hWnd ); // true if window is minimized

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		#endregion Check If Minimized
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		#region Get Window Size
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		// Get window position and size
```

		// https://stackoverflow.com/a/1434577

		[DllImport( "user32.dll", SetLastError = true )]

		[return: MarshalAs( UnmanagedType.Bool )]

		static extern bool GetWindowRect( IntPtr hWnd, ref RECT lpRect );

		[StructLayout( LayoutKind.Sequential )]

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		public struct RECT
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		{
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			public int Left;
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			public int Top;
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			public int Right;
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			public int Bottom;
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		}
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		#endregion Get Window Size
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		#region List Desktop Windows
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		// Based on code by Rod Stephens
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		// List desktop windows in C#
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		// http://csharphelper.com/blog/2016/08/list-desktop-windows-in-c/

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		[DllImport( "user32.dll" )]
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		[return: MarshalAs( UnmanagedType.Bool )]

		private static extern bool IsWindowVisible( IntPtr hWnd );

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```

		[DllImport( "user32.dll", EntryPoint = "GetWindowText",

		ExactSpelling = false, CharSet = CharSet.Auto, SetLastError = true )]

		private static extern int GetWindowText( IntPtr hWnd, StringBuilder lpWindowText, int nMaxCount );

```
 
```

		[DllImport( "user32.dll", EntryPoint = "EnumDesktopWindows",

		ExactSpelling = false, CharSet = CharSet.Auto, SetLastError = true )]

		private static extern bool EnumDesktopWindows( IntPtr hDesktop, EnumDelegate lpEnumCallbackFunction, IntPtr lParam );

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		// Define the callback delegate's type.

		private delegate bool EnumDelegate( IntPtr hWnd, int lParam );

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		// Save window titles and handles in Dictionary

		private static Dictionary<IntPtr, string> windows;

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		// Return a list of the desktop windows' handles and titles.

		public static void GetDesktopWindowHandlesAndTitles( out Dictionary<IntPtr, string> windowslist )

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		{
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			windowslist = new Dictionary<IntPtr, string>( );

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			if ( !EnumDesktopWindows( IntPtr.Zero, FilterCallback, IntPtr.Zero ) )

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			{
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				windowslist = null;
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			}
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			else
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			{
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				windowslist = windows;
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			}
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		}
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		// We use this function to filter windows

		// This version selects visible windows that aren't minimized

		private static bool FilterCallback( IntPtr hWnd, int lParam )

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		{
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			// Get the window's title
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			StringBuilder sb_title = new StringBuilder( 1024 );

			int _ = GetWindowText( hWnd, sb_title, sb_title.Capacity );

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			string title = sb_title.ToString( );
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			// If the window is visible and has a title, save it.

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			if ( IsWindowVisible( hWnd ) )
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			{
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				if ( string.IsNullOrEmpty( title ) )

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				{
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					title = "(no title)";
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				}
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				windows.Add( hWnd, title );
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			}
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			// Return true to indicate that we should continue enumerating windows

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			return true;
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		}
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		#endregion List Desktop Windows
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		#region Move Window
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		// Based on code by Roberto Luis Bisb\u00E9

		// Moving windows programatically with Windows API, the path to WinResize

		// https://rlbisbe.net/2013/11/19/moving-windows-programatically-with-windows-api-the-path-to-winresize/

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		[DllImport( "user32.dll" )]
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		public static extern bool MoveWindow( IntPtr hWnd, int X, int Y, int nWidth, int nHeight, bool bRepaint );

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		#endregion Move Window
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		#region Restore Window
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		// private const int SW_SHOWNORMAL = 1;

		// private const int SW_SHOWMINIMIZED = 2;

		private const int SW_SHOWMAXIMIZED = 3;

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		[DllImport( "user32.dll" )]
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		private static extern bool ShowWindow( IntPtr hWnd, int nCmdShow );

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		[DllImport( "user32.dll" )]
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		private static extern bool ShowWindowAsync( IntPtr hWnd, int nCmdShow );

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		#endregion Restore Window
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		#region Error handling
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		public static int ShowHelp( params string[] errmsg )

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		{
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			#region Error Message
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			if ( errmsg.Length > 0 )
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			{
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				List<string> errargs = new List<string>( errmsg );

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				errargs.RemoveAt( 0 );
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				Console.Error.WriteLine( );
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				Console.ForegroundColor = ConsoleColor.Red;

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				Console.Error.Write( "ERROR:\t" );
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				Console.ForegroundColor = ConsoleColor.White;

				Console.Error.WriteLine( errmsg[0], errargs.ToArray( ) );

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				Console.ResetColor( );
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			}
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			#endregion Error Message
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			#region Help Text
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```
```
			/*
```
```
			CatchStrayWindows.exe,  Version 1.00
```

			Move out-of-sight windows back to the primary screen

```
 
```

			Usage:   CatchStrayWindows  [ /IA ]  [ /IM ]

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```

			Options: /IA	Include Anonymous windows, i.e. those without title

			         /IM    Include Minimized windows

```
 
```

			Credits: Get window position and size

			         https://stackoverflow.com/a/1434577

			         List desktop windows based on code by Rod Stephens

			         http://csharphelper.com/blog/2016/08/list-desktop-windows-in-c/

			         Moving windows based on code by Roberto Luis Bisb\u00E9

			         https://rlbisbe.net/2013/11/19/

			         moving-windows-programatically-with-windows-api-the-path-to-winresize/

```
 
```

			Note:    Return code equals number of moved windows, or -1 in case of errors.

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```
```
			Written by Rob van der Woude
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			https://www.robvanderwoude.com
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			*/
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			#endregion Help Text
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			#region Display Help Text
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			Console.Error.WriteLine( );
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			Console.Error.WriteLine( "CatchStrayWindows.exe,  Version {0}", progver );

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			Console.Error.WriteLine( "Move out-of-sight windows back to the primary screen" );

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			Console.Error.WriteLine( );
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			Console.Error.Write( "Options: " );
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			Console.ForegroundColor = ConsoleColor.White;

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			Console.Error.Write( "/IA    I" );
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			Console.ResetColor( );
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			Console.Error.Write( "nclude " );
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			Console.ForegroundColor = ConsoleColor.White;

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			Console.Error.Write( "A" );
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			Console.ResetColor( );
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			Console.Error.WriteLine( "nonymous windows, i.e. those without title" );

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			Console.ForegroundColor = ConsoleColor.White;

			Console.Error.Write( "         /IM    I" );

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			Console.ResetColor( );
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			Console.Error.Write( "nclude " );
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			Console.ForegroundColor = ConsoleColor.White;

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			Console.Error.Write( "M" );
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			Console.ResetColor( );
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			Console.Error.WriteLine( "inimized windows" );

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			Console.Error.WriteLine( );
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			Console.Error.WriteLine( "Credits: Get window position and size" );

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			Console.ForegroundColor = ConsoleColor.DarkGray;

			Console.Error.WriteLine( "         https://stackoverflow.com/a/1434577" );

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			Console.ResetColor( );
```
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			Console.Error.WriteLine( "         List desktop windows based on code by Rod Stephens" );

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			Console.ForegroundColor = ConsoleColor.DarkGray;

			Console.Error.WriteLine( "         http://csharphelper.com/blog/2016/08/list-desktop-windows-in-c/" );

```
			Console.ResetColor( );
```
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			Console.Error.WriteLine( "         Moving windows based on code by Roberto Luis Bisb\u00E9" );

```
 
```

			Console.ForegroundColor = ConsoleColor.DarkGray;

			Console.Error.WriteLine( "         https://rlbisbe.net/2013/11/19/" );

			Console.Error.WriteLine( "         moving-windows-programatically-with-windows-api-the-path-to-winresize/" );

```
			Console.ResetColor( );
```
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```
```
			Console.Error.WriteLine( );
```
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			Console.Error.WriteLine( "Note:    Return code equals number of moved windows, or -1 in case of errors." );

```
 
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			Console.Error.WriteLine( );
```
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			Console.Error.WriteLine( "Written by Rob van der Woude" );

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			Console.Error.WriteLine( "https://www.robvanderwoude.com" );

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			#endregion Display Help Text
```
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```
			return -1;
```
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		}
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		#endregion Error handling
```
```
	}
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}
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```