change color of a pixel

[chopficaro]

i would like to compile something that will change the color of the pixel at coodinates 505, 712 to red, and i want it to take precidence over all other graphic processes, but i dont know what libraries i need. or really where to start

[jsmith]

Neither do we, because you have to provide more detail, like what OS are you using, what development suite (compiler), etc.

[chopficaro]

windows xp 32
microsoft visual studio 2008 express

[Duthomhas]

In the root window (the desktop)?

Or in an application window (like your program? on a titlebar? someone else's program)?

Or in whatever happens to be at that pixel?

[chopficaro]

what i had in mind was changing it to red no matter what, but to perhaps give us more options i will tell you the purpose
in the game counterstrike1.6, the target cross hairs are in the wrong place, so i want to make another set of cross hairs. the game is played in full screen mode.

[chopficaro]

the game is not open source
i thought this would be simple to do, but maybe it is in fact very difficult
i am very committed to this project so if i have to do allot of research just point me in the right direction

[Toxic90]

maybe you dont have to modify the source of the CS, just make a program to create that point and make it always visible

[chopficaro]

how?

[stitch]

an easy way to achieve your goal would be to stick a very small piece of paper on your monitor where the crosshairs should be, yes its a low tech solution but it could save you hours and hours of frustration.

[Bazzy]

If you don't mind using windows.h, a solution is to create a very small window staying allways on top

[chris]

Firstly, good game on counter-strike 1.6, excellent game. Secondly:

#include<windows.h>
int main()
{
HDC hdc=GetDC(NULL);
while(1)
{
SetPixel(hdc,712,505,255);
Sleep(1);
}
return 0;
}

works for me. (If it does not work for you I can get an executable working & E-mail it to you if you give me your E-mail).
I used Dev-Cpp 4.9.9.2 to compile this.

[Bazzy]

If you don't want to have a console window, this should be better:

#include <windows.h>

unsigned long color = RGB(255,0,0);
int x=505,
      y=712;

LRESULT WndProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
      if (Msg==WM_DESTROY) PostQuitMessage(0);
      return DefWindowProcA(hWnd,Msg,wParam,lParam);
}
int __stdcall WinMain(HINSTANCE hInstance, HINSTANCE hPrevious, char* Cmd, int Show)
{
      WNDCLASSA wcl = { CS_VREDRAW|CS_HREDRAW,(WNDPROC)WndProc,0,0,hInstance,0,0,CreateSolidBrush(color),0,"win"};
      RegisterClassA(&wcl);
      HWND wind = CreateWindowExA(WS_EX_TOPMOST,"win","Pixel",WS_POPUP|WS_VISIBLE|WS_SYSMENU,x,y,1,1,0,0,hInstance,0);
      MSG Msg;
      while (GetMessageA(&Msg,0,0,0))
      {
            TranslateMessage(&Msg);
            DispatchMessageA(&Msg);
      }
      return 0;
}