ScreenCapture@win32:C#/C++

C# ScreenCaputre on Github

https://github.com/heinrichelsigan/area23.at/blob/main/WinForm/ScreenShot/ScreenCapture.cs

https://github.com/heinrichelsigan/area23.at/blob/main/WinForm/ScreenShot/NativeMethods.cs

C++ Stack Overflow

void dump_buffer()
{
   IDirect3DSurface9* pRenderTarget=NULL;
   IDirect3DSurface9* pDestTarget=NULL;
     const char file[] = "Pickture.bmp";
   // sanity checks.
   if (Device == NULL)
      return;

   // get the render target surface.
   HRESULT hr = Device->GetRenderTarget(0, &pRenderTarget);
   // get the current adapter display mode.
   //hr = pDirect3D->GetAdapterDisplayMode(D3DADAPTER_DEFAULT,&d3ddisplaymode);

   // create a destination surface.
   hr = Device->CreateOffscreenPlainSurface(DisplayMde.Width,
                         DisplayMde.Height,
                         DisplayMde.Format,
                         D3DPOOL_SYSTEMMEM,
                         &pDestTarget,
                         NULL);
   //copy the render target to the destination surface.
   hr = Device->GetRenderTargetData(pRenderTarget, pDestTarget);
   //save its contents to a bitmap file.
   hr = D3DXSaveSurfaceToFile(file,
                              D3DXIFF_BMP,
                              pDestTarget,
                              NULL,
                              NULL);

   // clean up.
   pRenderTarget->Release();
   pDestTarget->Release();
}

C# with Microsoft Expression Encoder 4 with Service Pack 2 (SP2)

using System;
using System.Drawing;
using Microsoft.Expression.Encoder.ScreenCapture;

// Added references to:
// Microsoft.Expression.Encoder
// Microsoft.Expression.Encoder.Types
// Microsoft.Expression.Encoder.Utilities
// WindowsBase
// System.Drawing (for Rectangle)

namespace scrcap
{
    class Program
    {
        static void Main(string[] args)
        {
            ScreenCaptureJob job = new ScreenCaptureJob();

            // You can capture a window by setting its coordinates here
            job.CaptureRectangle = new Rectangle(100, 100, 200, 200);

            // Include the mouse pointer in the captured video
            job.CaptureMouseCursor = true;

            // Outfile U can transcode the xesc file to something else later.
            // Note that's silently does nothing if the file already exists.
            job.OutputScreenCaptureFileName = @"C:\Windows\Temp\capture.xesc";

            // Do some capture
            job.Start();
            // Wait for a keypress
            Console.ReadKey();
            // And stop
            job.Stop();
        }
    }
}

Another C++ Example

C# by using Screen Video Capturing SDK

using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
using System.Diagnostics;
using BytescoutScreenCapturingLib; //bytescout screencapturing activex object 

namespace SimpleCaptureCSharp
{
   class Program
   {
       static void Main(string[] args)
       {
           // create new screen capturer objec
           CapturerClass capturer = new CapturerClass(); 
           capturer.CapturingType = CaptureAreaType.catScreen; 
           // set capturing area type to catScreen to capture whole screen 
           capturer.OutputFileName = "EntireScreenCaptured.wmv"; 
           // set output video filename to .WMV or .AVI file 
           // set output video width and height 
           capturer.OutputWidth = 640; 
           capturer.OutputHeight = 480; 
// uncomment 2 set Bytescout Lossless Video format output video compression 
// do not forget to set file to .avi format if you use Video Codec Name 
// capturer.CurrentVideoCodecName = "Bytescout Lossless"; 
           capturer.Run(); // run screen video capturing 
           Thread.Sleep(15000); // wait for 15 seconds 
           capturer.Stop(); // stop video capturing 
           Process.Start("EntireScreenCaptured.wmv"); 
       } 
   } 
}