using System;

using System.Collections.Generic;

using System.Drawing;

using System.Linq;

using System.Runtime.InteropServices;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace ScreenTask

{

public class ScreenCapturePInvoke

{

[StructLayout(LayoutKind.Sequential)]

private struct CURSORINFO

{

public Int32 cbSize;

public Int32 flags;

public IntPtr hCursor;

public POINTAPI ptScreenPos;

}

[StructLayout(LayoutKind.Sequential)]

private struct POINTAPI

{

public int x;

public int y;

}

[DllImport("user32.dll")]

private static extern bool GetCursorInfo(out CURSORINFO pci);

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

static extern bool DrawIconEx(IntPtr hdc, int xLeft, int yTop, IntPtr hIcon, int cxWidth, int cyHeight, int istepIfAniCur, IntPtr hbrFlickerFreeDraw, int diFlags);

private const Int32 CURSOR_SHOWING = 0x0001;

private const Int32 DI_NORMAL = 0x0003;

public static Bitmap CaptureFullScreen(bool captureMouse)

{

var allBounds = Screen.AllScreens.Select(s => s.Bounds).ToArray();

Rectangle bounds = Rectangle.FromLTRB(allBounds.Min(b => b.Left), allBounds.Min(b => b.Top), allBounds.Max(b => b.Right), allBounds.Max(b => b.Bottom));

var bitmap = CaptureScreen(bounds, captureMouse);

return bitmap;

}

public static Bitmap CapturePrimaryScreen(bool captureMouse)

{

Rectangle bounds = Screen.PrimaryScreen.Bounds;

var bitmap = CaptureScreen(bounds, captureMouse);

return bitmap;

}

public static Bitmap CaptureScreen(Rectangle bounds, bool captureMouse)

{

Bitmap result = new Bitmap(bounds.Width, bounds.Height);

try

{

using (Graphics g = Graphics.FromImage(result))

{

g.CopyFromScreen(bounds.Location, Point.Empty, bounds.Size);

if (captureMouse)

{

CURSORINFO pci;

pci.cbSize = Marshal.SizeOf(typeof(CURSORINFO));

if (GetCursorInfo(out pci))

{

if (pci.flags == CURSOR_SHOWING)

{

var hdc = g.GetHdc();

DrawIconEx(hdc, pci.ptScreenPos.x - bounds.X, pci.ptScreenPos.y - bounds.Y, pci.hCursor, 0, 0, 0, IntPtr.Zero, DI_NORMAL);

g.ReleaseHdc();

}

}

}

}

}

catch

{

result = null;

}

return result;

}

}

}