Aimthere Crosshair | Directly from Source Code

void Crosshair()
{

	int iX, iY;
	Interfaces::Engine->GetScreenSize(iX, iY);

	int cX = iX / 2;
	int cY = iY / 2;

	Interfaces::surface->DrawSetColor(240, 0, 0, 255);
	Interfaces::surface->DrawLine(cX, cY + 12, cX, cY - 12);
	Interfaces::surface->DrawLine(cX + 12, cY, cX - 12, cY);

	Interfaces::surface->DrawSetColor(255, 255, 255, 255);
	Interfaces::surface->DrawLine(cX, cY + 7, cX, cY - 7);
	Interfaces::surface->DrawLine(cX + 7, cY, cX - 7, cY);
}