/// <summary>
/// captures a bitmap of the currently visible desktop (all screens)
/// </summary>
/// <returns></returns>
public static Bitmap CaptureDesktop()
{
Win32ErrorException error = null;
var screenRectangle = Rectangle.Empty;
var screens = Screen.AllScreens;
// Create a rectangle encompassing all screens...
foreach (var screen in screens)
{
screenRectangle = Rectangle.Union(screenRectangle, screen.Bounds);
}
//Create target composite bitmap
var bitmap = new Bitmap(screenRectangle.Width, screenRectangle.Height);
// Get a graphics object for the composite bitmap and initialize it...
var graphics = Graphics.FromImage(bitmap);
graphics.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighSpeed;
graphics.Clear(SystemColors.Desktop);
// Get an HDC for the composite area...
var target = graphics.GetHdc();
// Now, loop through screens, BitBlting each to the composite HDC created above...
foreach (var screen in screens)
{
// Create DC for each source monitor...
var source = GDI32.SafeNativeMethods.CreateDC(IntPtr.Zero, screen.DeviceName, IntPtr.Zero, IntPtr.Zero);
// Blt the source directly to the composite destination...
var x = screen.Bounds.X - screenRectangle.X;
var y = screen.Bounds.Y - screenRectangle.Y;
var thisOne = GDI32.SafeNativeMethods.StretchBlt(target, x, y, screen.Bounds.Width, screen.Bounds.Height, source, 0, 0, screen.Bounds.Width, screen.Bounds.Height, GDI32.TernaryRasterOperations.SRCCOPY);
if (!thisOne)
{
error = new Win32ErrorException();
}
// Cleanup source HDC...
GDI32.SafeNativeMethods.DeleteDC(source);
if (!thisOne)
{
break;
}
}
// Cleanup destination HDC and Graphics...
graphics.ReleaseHdc(target);
graphics.Dispose();
// Return composite bitmap or throw exception
if (error != null)
{
throw error;
}
return(bitmap);
}
/// <summary>
/// Obtains the executable name of the process
/// </summary>
/// <param name="processID"></param>
/// <param name="throwExException"></param>
/// <returns></returns>
public static string GetExecutableName(int processID, bool throwExException)
{
Exception error = null;
var result = new StringBuilder(65536);
var len = result.Capacity;
if ((Environment.OSVersion.Platform == PlatformID.Win32NT) && (Environment.OSVersion.Version >= new Version("6.0")))
{
var processHandle = KERNEL32.SafeNativeMethods.OpenProcess(ACCESS_PROCESS.QUERY_INFORMATION, false, processID);
if (processHandle == IntPtr.Zero)
{
//try limited
processHandle = KERNEL32.SafeNativeMethods.OpenProcess(ACCESS_PROCESS.QUERY_LIMITED_INFORMATION, false, processID);
}
if (processHandle == IntPtr.Zero)
{
error = new Win32ErrorException();
}
else if (!KERNEL32.SafeNativeMethods.QueryFullProcessImageName(processHandle, 0, result, ref len))
{
error = new Win32ErrorException();
}
KERNEL32.SafeNativeMethods.CloseHandle(processHandle);
}
else
{
var processHandle = KERNEL32.SafeNativeMethods.OpenProcess(ACCESS_PROCESS.QUERY_INFORMATION | ACCESS_PROCESS.VM_READ, false, processID);
if (processHandle == IntPtr.Zero)
{
error = new Win32ErrorException();
}
else
{
len = PSAPI.GetModuleFileNameEx(processHandle, IntPtr.Zero, result, len);
if (len == 0)
{
error = new Win32ErrorException();
}
}
KERNEL32.SafeNativeMethods.CloseHandle(processHandle);
}
if (throwExException && (error != null))
{
throw error;
}
return(result.ToString());
}
