.NET (Core and Framework)

Harrison Jones wrote:

I'm trying to capture a screenshot of a window using a window handle without having to bring the window to the front.

[DllImport("user32.dll")]
private static extern bool PrintWindow(IntPtr hwnd, IntPtr hdcBlt, uint nFlags);

[DllImport("user32.dll")]
private static extern int GetWindowRect(IntPtr hWnd, ref Rectangle rect);
		
[DllImport("user32.dll",EntryPoint="GetDC")]
public static extern IntPtr GetDC(IntPtr ptr);

[DllImport("gdi32.dll",EntryPoint="DeleteObject")]
public static extern IntPtr DeleteObject(IntPtr hDc);
        
private Bitmap Capture(IntPtr pHwnd)
{

// Rectobject
Rectangle r = new Rectangle(0,0,0,0);
			
// GetWindowRectangle
GetWindowRect(pHwnd,ref r);
// Set Client Rectangle only (like ALT + Print)
r.Width = r.Width - r.X;
r.Height = r.Height - r.Y;
									
// Create new empty Bitmap
Bitmap bmp = new Bitmap(r.Width,r.Height);
			
// Get Grapthics from Bitmap
Graphics e = Graphics.FromImage(bmp);
			
// Get Graphics Handle
IntPtr ptr = e.GetHdc();
			
try
{
	// Get DeviceContext Handles
	IntPtr hDC = GetDC(pHwnd);
				
	// Copy Screen from Process-Handle into Bitmap handle
	PrintWindow(pHwnd,ptr,0);
				
	// Delete the DeviceContextHandle
	DeleteObject(hDC);
}catch{}

// Apply new bitmap handle with graphics
e.ReleaseHdc(ptr);
			
// apply changes
e.Flush();
			
// free graphic object
e.Dispose();

return bmp;

}

<system.net>
  <connectionManagement>
      <clear/>
      <add address="*" maxconnection="20" />
  </connectionManagement>
</system.net>

Hardik Upadhyay wrote:

I want the source code to calculate the real time bandwidth usage of your computer.