[Help] I need help with my first c++ program

As my first c++ program, I am making a crosshair that will show on top of all other programs. I finished designing a cool shape pixel by pixel and coded it to show up, but whenever I go fullscreen, it dissapears. This means I can't use it for it's original purpose: FPS games. Here is the source, tell me if you have any ideas to fix this problem.

#include<windows.h>
#include<iostream>
int main()
{
int x = 960; /*This is just 1/2 the horizontal resolution, for possible development to work on multiple resolutions*/
int y = 600; /*same as previous but for y*/
HDC hdc=GetDC(NULL);
while(1)
{
SetPixel(hdc,x,y,255);
Sleep(1);
SetPixel(hdc,x+1,y,255);
Sleep(1);
SetPixel(hdc,x-1,y,255);
Sleep(1);
SetPixel(hdc,x,y+1,255);
Sleep(1);
SetPixel(hdc,x,y-1,255);
Sleep(1);
SetPixel(hdc,x+2,y,255);
Sleep(1);
SetPixel(hdc,x-2,y,255);
Sleep(1);
SetPixel(hdc,x,y+2,255);
Sleep(1);
SetPixel(hdc,x,y-2,255);
Sleep(1);
SetPixel(hdc,x-1,y-1,255);
Sleep(1);
SetPixel(hdc,x+1,y+1,255);
Sleep(1);
SetPixel(hdc,x+1,y-1,255);
Sleep(1);
SetPixel(hdc,x-1,y+1,255);
Sleep(1);
SetPixel(hdc,x-3,y,255);
Sleep(1);
SetPixel(hdc,x-2,y,255);
Sleep(1);
SetPixel(hdc,x-4,y,255);
Sleep(1);
SetPixel(hdc,x-3,y+1,255);
Sleep(1);
SetPixel(hdc,x-3,y-1,255);
Sleep(1);
SetPixel(hdc,x-1,y,255);
Sleep(1);
SetPixel(hdc,x-5,y,255);
Sleep(1);
SetPixel(hdc,x-3,y+2,255);
Sleep(1);
SetPixel(hdc,x-3,y-2,255);
Sleep(1);
SetPixel(hdc,x-4,y-1,255);
Sleep(1);
SetPixel(hdc,x-2,y+1,255);
Sleep(1);
SetPixel(hdc,x-2,y-1,255);
Sleep(1);
SetPixel(hdc,x-4,y+1,255);
Sleep(1);
SetPixel(hdc,x+3,y,255);
Sleep(1);
SetPixel(hdc,x+4,y,255);
Sleep(1);
SetPixel(hdc,x+2,y,255);
Sleep(1);
SetPixel(hdc,x+3,y+1,255);
Sleep(1);
SetPixel(hdc,x+3,y-1,255);
Sleep(1);
SetPixel(hdc,x+5,y,255);
Sleep(1);
SetPixel(hdc,x+1,y,255);
Sleep(1);
SetPixel(hdc,x+3,y+2,255);
Sleep(1);
SetPixel(hdc,x+3,y-2,255);
Sleep(1);
SetPixel(hdc,x+2,y-1,255);
Sleep(1);
SetPixel(hdc,x+4,y+1,255);
Sleep(1);
SetPixel(hdc,x+4,y-1,255);
Sleep(1);
SetPixel(hdc,x+2,y+1,255);
Sleep(1);
SetPixel(hdc,x,y+3,255);
Sleep(1);
SetPixel(hdc,x+1,y+3,255);
Sleep(1);
SetPixel(hdc,x-1,y+3,255);
Sleep(1);
SetPixel(hdc,x,y+4,255);
Sleep(1);
SetPixel(hdc,x,y+2,255);
Sleep(1);
SetPixel(hdc,x+2,y+3,255);
Sleep(1);
SetPixel(hdc,x-2,y+3,255);
Sleep(1);
SetPixel(hdc,x,y+5,255);
Sleep(1);
SetPixel(hdc,x,y+1,255);
Sleep(1);
SetPixel(hdc,x-1,y+2,255);
Sleep(1);
SetPixel(hdc,x+1,y+4,255);
Sleep(1);
SetPixel(hdc,x+1,y+2,255);
Sleep(1);
SetPixel(hdc,x-1,y+4,255);
Sleep(1);
SetPixel(hdc,x,y-3,255);
Sleep(1);
SetPixel(hdc,x+1,y-3,255);
Sleep(1);
SetPixel(hdc,x-1,y-3,255);
Sleep(1);
SetPixel(hdc,x,y-2,255);
Sleep(1);
SetPixel(hdc,x,y-4,255);
Sleep(1);
SetPixel(hdc,x+2,y-3,255);
Sleep(1);
SetPixel(hdc,x-2,y-3,255);
Sleep(1);
SetPixel(hdc,x,y-1,255);
Sleep(1);
SetPixel(hdc,x,y-5,255);
Sleep(1);
SetPixel(hdc,x-1,y-4,255);
Sleep(1);
SetPixel(hdc,x+1,y-2,255);
Sleep(1);
SetPixel(hdc,x+1,y-4,255);
Sleep(1);
SetPixel(hdc,x-1,y-2,255);
Sleep(1);
SetPixel(hdc,x+6,y,255);
Sleep(1);
SetPixel(hdc,x+7,y,255);
Sleep(1);
SetPixel(hdc,x+5,y,255);
Sleep(1);
SetPixel(hdc,x+6,y+1,255);
Sleep(1);
SetPixel(hdc,x+6,y-1,255);
Sleep(1);
SetPixel(hdc,x+8,y,255);
Sleep(1);
SetPixel(hdc,x+4,y,255);
Sleep(1);
SetPixel(hdc,x+6,y+2,255);
Sleep(1);
SetPixel(hdc,x+6,y-2,255);
Sleep(1);
SetPixel(hdc,x+5,y-1,255);
Sleep(1);
SetPixel(hdc,x+7,y+1,255);
Sleep(1);
SetPixel(hdc,x+7,y-1,255);
Sleep(1);
SetPixel(hdc,x+5,y+1,255);
Sleep(1);
SetPixel(hdc,x-6,y,255);
Sleep(1);
SetPixel(hdc,x-5,y,255);
Sleep(1);
SetPixel(hdc,x-7,y,255);
Sleep(1);
SetPixel(hdc,x-6,y+1,255);
Sleep(1);
SetPixel(hdc,x-6,y-1,255);
Sleep(1);
SetPixel(hdc,x-4,y,255);
Sleep(1);
SetPixel(hdc,x-8,y,255);
Sleep(1);
SetPixel(hdc,x-6,y+2,255);
Sleep(1);
SetPixel(hdc,x-6,y-2,255);
Sleep(1);
SetPixel(hdc,x-7,y-1,255);
Sleep(1);
SetPixel(hdc,x-5,y+1,255);
Sleep(1);
SetPixel(hdc,x-5,y-1,255);
Sleep(1);
SetPixel(hdc,x-7,y+1,255);
Sleep(1);
SetPixel(hdc,x,y+6,255);
Sleep(1);
SetPixel(hdc,x+1,y+6,255);
Sleep(1);
SetPixel(hdc,x-1,y+6,255);
Sleep(1);
SetPixel(hdc,x,y+7,255);
Sleep(1);
SetPixel(hdc,x,y+5,255);
Sleep(1);
SetPixel(hdc,x+2,y+6,255);
Sleep(1);
SetPixel(hdc,x-2,y+6,255);
Sleep(1);
SetPixel(hdc,x,y+8,255);
Sleep(1);
SetPixel(hdc,x,y+4,255);
Sleep(1);
SetPixel(hdc,x-1,y+5,255);
Sleep(1);
SetPixel(hdc,x+1,y+7,255);
Sleep(1);
SetPixel(hdc,x+1,y+5,255);
Sleep(1);
SetPixel(hdc,x-1,y+7,255);
Sleep(1);
SetPixel(hdc,x,y-6,255);
Sleep(1);
SetPixel(hdc,x+1,y-6,255);
Sleep(1);
SetPixel(hdc,x-1,y-6,255);
Sleep(1);
SetPixel(hdc,x,y-5,255);
Sleep(1);
SetPixel(hdc,x,y-7,255);
Sleep(1);
SetPixel(hdc,x+2,y-6,255);
Sleep(1);
SetPixel(hdc,x-2,y-6,255);
Sleep(1);
SetPixel(hdc,x,y-4,255);
Sleep(1);
SetPixel(hdc,x,y-8,255);
Sleep(1);
SetPixel(hdc,x-1,y-7,255);
Sleep(1);
SetPixel(hdc,x+1,y-5,255);
Sleep(1);
SetPixel(hdc,x+1,y-7,255);
Sleep(1);
SetPixel(hdc,x-1,y-5,255);
Sleep(1);
}
return 0;
}

using

might get you help faster

Most games block trying to draw topmost. You're going to have to hook onto the functions the game uses to draw and use it to draw your crosshair. Well, as far as I know, that's the only way.

This is why programmers invented loops. :L

Try using a drawline function as well as it would be a lot easier, also not sure if this will work for Games since they write directly to the screen buffer.

My "Hello World" pwns his crosshair

Notepad tells me you have 234 lines within your while loop.
234/2 = 117 Sleep(1)'s.
That would be about 120 miliseconds per draw loop, 1000/120 = 8.34 per second.
Lag up your game so you have less then 8 fps and you should see it just fine(or just remove all Sleep(1)'s except for the very last one :P)