Screen Capturing

/*----------------------------------------------------------------------------------------

	A-Soft Ingenieurbüro

	Copyright © 1994 - 2007. All Rights reserved.

	Related Copyrights :

			Microsoft .NET Windows Forms V2.0 library.
			Copyright (C) 2004...2006 Microsoft Corporation,
			All rights reserved.


	FILE		:	NativeMethods.cs

	PROJECT		:	A-Soft Library
	SUB			:	Standard Library
 
	SYSTEM		:	Windows-XP, (Windows 2000), C# (.NET 2.0, Visual Studio.NET 2005)

	AUTHOR		:	Joachim Holzhauer
	
	DESCRIPTION	:	Map some definitions from WIN32 native interface
 
	VERSION		:	1.0 - 2006.01.31

----------------------------------------------------------------------------------------*/

using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Runtime.InteropServices;

namespace ASFTBase
{
	/// <summary>
	/// Helper class which maps some WIN32 values
	/// </summary>
	[System.Security.SuppressUnmanagedCodeSecurity()]
	[System.Runtime.InteropServices.ComVisible( false )]
	internal sealed class NativeMethods
	{
		private NativeMethods() { }

		#region RECT structure

		[StructLayout( LayoutKind.Sequential )]
		internal struct RECT
		{
			public int left;
			public int top;
			public int right;
			public int bottom;

			public RECT( int left, int top, int right, int bottom )
			{
				this.left = left;
				this.top = top;
				this.right = right;
				this.bottom = bottom;
			}

			public Rectangle Rect 
			{ 
				get { return new Rectangle( this.left, this.top, this.right - this.left, this.bottom - this.top ); } 
			}

			public static RECT FromXYWH( int x, int y, int width, int height )
			{
				return new RECT( x, y, x + width, y + height );
			}

			public static RECT FromRectangle( Rectangle rect )
			{
				return new RECT( rect.Left, rect.Top, rect.Right, rect.Bottom );
			}
		}

		#endregion RECT structure

		/// <summary>
		/// Get a windows rectangle in a RECT structure
		/// </summary>
		/// <param name="hwnd">The window handle to look up</param>
		/// <param name="rect">The rectangle</param>
		/// <returns></returns>
		[DllImport( "user32.dll", ExactSpelling = true, CharSet = CharSet.Auto )]
		public static extern bool GetWindowRect( IntPtr hwnd, out RECT rect );

		/// <summary>
		/// The BringWindowToTop function brings the specified window to the top of the Z order. 
		/// If the window is a top-level window, it is activated. 
		/// If the window is a child window, the top-level parent window associated 
		/// with the child window is activated. 
		/// </summary>
		/// <param name="hWnd">Handle to the window to bring to the top of the Z order. </param>
		/// <returns>If the function succeeds, the return value is nonzero.
		/// If the function fails, the return value is zero. 
		/// To get extended error information, call GetLastError. 
		/// </returns>
		[DllImport( "user32.dll", ExactSpelling = true, CharSet = CharSet.Auto )]
		public static extern bool BringWindowToTop( IntPtr hWnd );


		/// <summary>
		/// Get a windows rectangle in a .NET structure
		/// </summary>
		/// <param name="hwnd">The window handle to look up</param>
		/// <returns>The rectangle</returns>
		public static Rectangle GetWindowRect( IntPtr hwnd )
		{
			RECT rect = new RECT();
			GetWindowRect( hwnd, out rect );
			return rect.Rect;
		}
	}

}