How to make a crosshair in c++

Plese if u can show me the code please

Globals :

float ScreenCenterX = 0.0f;
float ScreenCenterY = 0.0f;
bool crosshair = false;
D3DCOLOR redt = D3DCOLOR_XRGB( 255, 0, 0 );

SetViewport :

ScreenCenterX = ( float )pViewport->Width / 2;
ScreenCenterY = ( float )pViewport->Height / 2;

Endscene :

if(xhair)
{
D3DRECT rec2 = {ScreenCenterX-20, ScreenCenterY, ScreenCenterX+ 20, ScreenCenterY+2};
D3DRECT rec3 = {ScreenCenterX, ScreenCenterY-20, ScreenCenterX+ 2,ScreenCenterY+20};

m_pD3Ddev->Clear(1, &rec2, D3DCLEAR_TARGET,redt, 0, 0);
m_pD3Ddev->Clear(1, &rec3, D3DCLEAR_TARGET,redt, 0, 0);

Don't forget to press thanks if i helped =)

Thanks man but what i need to include windows.h or what tell me all the code okay and i will add u a rep+

full code for setpixel crosshair:

Code:

#include <windows.h>
#include <iostream>
#include <math.h>
using namespace std;

bool crosshairon=false;
HDC ragedc = NULL;
int crosshairsize=0;
int cx=0;
int cy=0;

void CrossThread(void)
{
	while(1)
	{
		if(GetAsyncKeyState(VK_NUMPAD0)&1)
		{
			crosshairon=!crosshairon;
			ragedc = GetDC(HWND_DESKTOP);
			cx=GetSystemMetrics(SM_CXSCREEN)/2-((crosshairsize-1)/2);
			cy=GetSystemMetrics(SM_CYSCREEN)/2-((crosshairsize-1)/2);
		}
		Sleep(1);
	}
}

int main()
{
	cout<<"Crosshair size in pixels:\n";
	cin>>crosshairsize;
	if(crosshairsize%2==0) //check if its even
	{
		crosshairsize+=1; //if it is add 1
	}
	system("cls"); // clear the console :)
	cout<<"Press numpad0 to toggle the crosshair on and off\n";
	CreateThread(0,0,(LPTHREAD_START_ROUTINE)CrossThread,0,0,0);
	while(1)
	{
		if(crosshairon==true)
		{
			for(int i=0;i<crosshairsize;i++)
			{
				SetPixel(ragedc, cx+i, cy+((crosshairsize-1)/2), RGB(255,0,0));
				SetPixel(ragedc, cx+((crosshairsize-1)/2), cy+i, RGB(255,0,0));
			}
		}
		Sleep(1);
	}
}

compile with VC++

How to make a crosshair in c++

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