GetAsyncKeyState.... -

#define KEYDOWN(vk_code) ((GetAsyncKeyState(vk_code) & 0x8000 ? 1 : 0)


#define KEYUP(vk_code) ((GetAsyncKeyState(vk_code) & 0x8000 ? 0 : 1)  


if(GetAsyncKeyState(VK_LEFT)){
	// Move player left
	player.x--;
	SetPixel(hdc,(player.x)+1, (player.y),RGB(255,255,255));
	SetPixel(hdc,player.x-=2, player.y,player.color);
	
}
if(GetAsyncKeyState(VK_RIGHT)){
	// Move player right
	player.x++;
	SetPixel(hdc,(player.x)-1, (player.y),RGB(255,255,255));
	SetPixel(hdc,player.x+=2, player.y,player.color);
}
if(GetAsyncKeyState(VK_UP)){
	// Move player up
	
	player.y--;
	SetPixel(hdc,(player.x), (player.y)+1,RGB(255,255,255));
	SetPixel(hdc,player.x, player.y-=2,player.color);
	if(player.y<=0){
		player.y = 500;
		SetPixel(hdc,(player.x), (0),RGB(255,255,255));
	}
}
if(GetAsyncKeyState(VK_DOWN)){
	// Move player down
	player.y++;
	SetPixel(hdc,(player.x), (player.y)-1,RGB(255,255,255));
	SetPixel(hdc,player.x, player.y+=2,player.color);
}

if(GetAsyncKeyState(0x41)){
	// Move player2 left
	player2.x--;
	SetPixel(hdc,(player2.x)+1, (player2.y),RGB(255,255,255));
	SetPixel(hdc,player2.x-=2, player2.y,player2.color);
	
}
if(GetAsyncKeyState(0x44)){
	// Move player2 right
	player2.x++;
	SetPixel(hdc,(player2.x)-1, (player2.y),RGB(255,255,255));
	SetPixel(hdc,player2.x+=2, player2.y,player2.color);
}
if(GetAsyncKeyState(0x57)){
	// Move player2 up
	
	player2.y--;
	SetPixel(hdc,(player2.x), (player2.y)+1,RGB(255,255,255));
	SetPixel(hdc,player2.x, player2.y-=2,player2.color);
	if(player2.y<=0){
		player2.y = 500;
		SetPixel(hdc,(player2.x), (0),RGB(255,255,255));
	}
}
if(GetAsyncKeyState(0x53)){
	// Move player2 down
	player2.y++;
	SetPixel(hdc,(player2.x), (player2.y)-1,RGB(255,255,255));
	SetPixel(hdc,player2.x, player2.y+=2,player2.color);
}