GDIStuff.cs

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

namespace ScreenshotCaptureWithMouse.ScreenCapture
{
    class GDIStuff
    {
        #region Class Variables
        public const int SRCCOPY = 13369376;
        #endregion


        #region Class Functions
        [DllImport("gdi32.dll", EntryPoint = "CreateDC")]
        public static extern IntPtr CreateDC(IntPtr lpszDriver, string lpszDevice, IntPtr lpszOutput, IntPtr lpInitData);

        [DllImport("gdi32.dll", EntryPoint = "DeleteDC")]
        public static extern IntPtr DeleteDC(IntPtr hDc);

        [DllImport("gdi32.dll", EntryPoint = "DeleteObject")]
        public static extern IntPtr DeleteObject(IntPtr hDc);

        [DllImport("gdi32.dll", EntryPoint = "BitBlt")]
        public static extern bool BitBlt(IntPtr hdcDest, int xDest,
                                         int yDest, int wDest,
                                         int hDest, IntPtr hdcSource,
                                         int xSrc, int ySrc, int RasterOp);

        [DllImport("gdi32.dll", EntryPoint = "CreateCompatibleBitmap")]
        public static extern IntPtr CreateCompatibleBitmap
                                    (IntPtr hdc, int nWidth, int nHeight);

        [DllImport("gdi32.dll", EntryPoint = "CreateCompatibleDC")]
        public static extern IntPtr CreateCompatibleDC(IntPtr hdc);

        [DllImport("gdi32.dll", EntryPoint = "SelectObject")]
        public static extern IntPtr SelectObject(IntPtr hdc, IntPtr bmp);
        #endregion       
    }
}