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Spy.cs
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Spy.cs
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using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Runtime.InteropServices;
namespace MLSpyware
{
internal class Spy
{
public Image CaptureScreen()
{
return CaptureWindow(User32.GetDesktopWindow());
}
public Image CaptureWindow(IntPtr handle)
{
IntPtr hdcSrc = User32.GetWindowDC(handle);
User32.RECT windowRect = new User32.RECT();
User32.GetWindowRect(handle, ref windowRect);
int width = windowRect.right - windowRect.left;
int height = windowRect.bottom - windowRect.top;
IntPtr hdcDest = GDI32.CreateCompatibleDC(hdcSrc);
IntPtr hBitmap = GDI32.CreateCompatibleBitmap(hdcSrc, width, height);
IntPtr hOld = GDI32.SelectObject(hdcDest, hBitmap);
GDI32.BitBlt(hdcDest, 0, 0, width, height, hdcSrc, 0, 0, GDI32.SRCCOPY);
GDI32.SelectObject(hdcDest, hOld);
GDI32.DeleteDC(hdcDest);
User32.ReleaseDC(handle, hdcSrc);
Image img = Image.FromHbitmap(hBitmap);
GDI32.DeleteObject(hBitmap);
return img;
}
public void CaptureWindowToFile(IntPtr handle, string filename, ImageFormat format)
{
Image img = CaptureWindow(handle);
img.Save(filename, format);
}
public void CaptureScreenToFile(string filename, ImageFormat format)
{
CaptureScreen().Save(filename, format);
}
private class GDI32
{
public const int SRCCOPY = 0x00CC0020; // BitBlt dwRop parameter
[DllImport("gdi32.dll")]
public static extern bool BitBlt(IntPtr hObject, int nXDest, int nYDest,
int nWidth, int nHeight, IntPtr hObjectSource,
int nXSrc, int nYSrc, int dwRop);
//The BitBlt function performs a bit-block transfer of the color data corresponding to
//a rectangle of pixels from the specified source device context into a destination device context.
[DllImport("gdi32.dll")]
public static extern IntPtr CreateCompatibleBitmap(IntPtr hDC, int nWidth,int nHeight);
//The CreateCompatibleBitmap function creates a bitmap compatible with the device that is associated with the specified device context.
[DllImport("gdi32.dll")]
public static extern IntPtr CreateCompatibleDC(IntPtr hDC);
//The CreateCompatibleDC function creates a memory device context (DC) compatible with the specified device.
[DllImport("gdi32.dll")]
public static extern bool DeleteDC(IntPtr hDC);
[DllImport("gdi32.dll")]
public static extern bool DeleteObject(IntPtr hObject);
[DllImport("gdi32.dll")]
public static extern IntPtr SelectObject(IntPtr hDC, IntPtr hObject);
//The SelectObject function selects an object into the specified device context (DC). The new object replaces the previous object of the same type.
}
private class User32
{
[StructLayout(LayoutKind.Sequential)]
public struct RECT
{
public int left;
public int top;
public int right;
public int bottom;
}
[DllImport("user32.dll")]
public static extern IntPtr GetDesktopWindow();
//Retrieves a handle to the desktop window. The desktop window covers the entire screen.
//The desktop window is the area on top of which other windows are painted.
[DllImport("user32.dll")]
public static extern IntPtr GetWindowDC(IntPtr hWnd);
//The GetWindowDC function retrieves the device context (DC)
//for the entire window, including title bar, menus, and scroll bars.
//A window device context permits painting anywhere in a window,
//because the origin of the device context is the upper-left corner of the window instead of the client area.
[DllImport("user32.dll")]
public static extern IntPtr ReleaseDC(IntPtr hWnd, IntPtr hDC);
[DllImport("user32.dll")]
public static extern IntPtr GetWindowRect(IntPtr hWnd, ref RECT rect);
//Retrieves the dimensions of the bounding rectangle of the specified window.
//The dimensions are given in screen coordinates that are relative to the upper-left corner of the screen.
}
}
}