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Error with GetAsyncKeyState.

Dainiusss (19)
Hi people. I am new one on programming. Today i wanted to make a simple game or something like that, but I get an error with GetAsyncKeyState. I searched that everythere but found nothing helpfull... I would be very thankfull if you help me with that :).

SOLVED
I added user32.lib to project > properties > linker > imput > aditional dependencies.

here's my unfinished program:

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

char map[10][30] = {
	"#############################",
	"#@                    ++    #",
	"#                           #",
	"#                 +         #",
	"#                           #",
	"#     +                     #",
	"#             +             #",
	"#                           #",
	"#                          O#",
	"#############################",
};

int x = 1;
int y = 1;
int iPinigai = 0;

double frameCount = 0;
double startTime = timeGetTime();
double lastTime = 0;

void timerUpdate(void)
{
	double currentTime = timeGetTime() - lastTime;
	if (currentTime < 1000)
		return;

	frameCount++;

	lastTime = timeGetTime();
}

void cursorVisibility(bool visibility)
{
	HANDLE output_handle;
	CONSOLE_CURSOR_INFO cciInfo;
	cciInfo.dwSize = 1;
	cciInfo.bVisible = visibility;
	output_handle = GetStdHandle(STD_OUTPUT_HANDLE);
	SetConsoleCursorInfo(output_handle, &cciInfo);
}

int main() {

	cursorVisibility(false);

	bool game_running = true;

	while (game_running = true) {
		system ("CLS");
		for (int display = 0; display < 10; display++) {
			cout << map[display] << endl;
		}
		cout << "\nYour money: " << iPinigai << endl;
		system ("pause > 0");

		if (GetAsyncKeyState(VK_DOWN)) {
			int y2 = y + 1;
			if (map[y2][x] == ' ') {
				map[y][x] = ' ';
				y++;
				map[y][x] = '@';
			}
			if (map[y2][x] == '+') {
				iPinigai = iPinigai + 1;
				map[y][x] = ' ';
				y++;
				map[y][x] = '@';
			}
		}
		if (GetAsyncKeyState(VK_UP)) {
			int y2 = y - 1;
			if (map[y2][x] == ' ') {
				map[y][x] = ' ';
				y--;
				map[y][x] = '@';
			}
			if (map[y2][x] == '+') {
				iPinigai = iPinigai + 1;
				map[y][x] = ' ';
				y--;
				map[y][x] = '@';
			}
		}
		if (GetAsyncKeyState(VK_RIGHT)) {
			int x2 = x + 1;
			if (map[y][x2] == ' ') {
				map[y][x] = ' ';
				x++;
				map[y][x] = '@';
			}
			if (map[y][x2] == '+') {
				iPinigai = iPinigai + 1;
				map[y][x] = ' ';
				x++;
				map[y][x] = '@';
			}
		}
		if (GetAsyncKeyState(VK_LEFT)) {
			int x2 = x - 1;
			if (map[y][x2] == ' ') {
				map[y][x] = ' ';
				x--;
				map[y][x] = '@';
			}
			if (map[y][x2] == '+') {
				iPinigai = iPinigai + 1;
				map[y][x] = ' ';
				x--;
				map[y][x] = '@';
			}
		}
		if (GetAsyncKeyState(VK_ESCAPE)) {
			game_running = false;
		}
	}

	cout << "\nGAME OVER!" << endl;
	return 0;
}


aaaaand theres the errors whitch i get :(

1>Zaidimas.obj : error LNK2019: unresolved external symbol __imp__GetAsyncKeyState@4 referenced in function _main

1>d:\dokumentai\visual studio 2010\Projects\Zaidimas2\Debug\Zaidimas2.exe : fatal error LNK1120: 1 unresolved externals
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