The easiest way of getting a pixel from a D3D Window.

Hi, guys I've been searching the Internet for a fast way of pixel analyzing. I have to get about 10000 pixels from a game window every 0,5 second and check if some of that pixels are blue. I tried GDI but it comed to that I had wait 9 seconds for comparsion of 60000 pixels!(the code of program below)-I need at least two screenshots in one second. Finally I get to know that D3D-GDI interactions are very poor. So here is my question: what is the simplest way of doing this comparision? I know one way but maybe there is something easier.

My "one way":
Hooking Direct3D9::Present or EndScene in the game
Reading out the back buffer and writing the pixel data to a shared memory mapped file
Reading said pixel data from my external app and rendering it to a Direct3D surface.

The code:

Code:

//--------------------------------------------------------------------------- #include <vcl.h> #pragma hdrstop #include "Some.h" //--------------------------------------------------------------------------- #pragma package(smart_init) #pragma resource "*.dfm" #include <windows.h> #include <stdio.h> #include <winuser.h> #include <windowsx.h> #include "fstream.h" //#include <mmsystem.h> String dir; String czas; String data; int b=0; int s=0; TColor * m=new TColor(RGB(0,0,0)); TCanvas &PulpitCanvas = *new TCanvas(); Graphics::TBitmap *bitmap = new Graphics::TBitmap; COLORREF k[116][114]; HWND Wnd; TForm1 *Form1; //--------------------------------------------------------------------------- __fastcall TForm1::TForm1(TComponent* Owner) : TForm(Owner) { } //--------------------------------------------------------------------------- void __fastcall TForm1::Timer1Timer(TObject *Sender) { b++; if(b>100) return; bitmap->Canvas->CopyRect(Rect(0, 0, bitmap->Width, bitmap->Height), &PulpitCanvas, Rect(0, 0, bitmap->Width, bitmap->Height)); for(int i=0; i<116; i++) { for(int j=0; j<114; j++) { if(bitmap->Canvas->Pixels[i][j]==*m); if(bitmap->Canvas->Pixels[i][j]==*m); if(bitmap->Canvas->Pixels[i][j]==*m); if(bitmap->Canvas->Pixels[i][j]==*m); if(bitmap->Canvas->Pixels[i][j]==*m); } } try { dir = ""; dir = dir + b+ ".bmp"; //zapisujemy do pliku bitmap->SaveToFile(dir); //ReleaseDC(0, PulpitCanvas.Handle); } catch(...) { } } //--------------------------------------------------------------------------- void __fastcall TForm1::FormCreate(TObject *Sender) { Wnd=FindWindow(NULL,"WINDOW"); if(Wnd==0) {MessageBox(0,"Ddint find the window!",0,0);} PulpitCanvas.Handle = GetDC(Wnd); bitmap->Width = 800;//Screen->Width; bitmap->Height = 600;//Screen->Height; } //---------------------------------------------------------------------------