GetAsyncKeyState not working - c++

Question

I'm fairly new to C++ as I'm more experienced with Java/Python etc. But, I've been trying to implement a simple Trigger Bot, but added a failsafe so that if I press a certain key, the program will call the exit(0) method. But the way I implemented key input doesn't seem to work, could someone maybe help me out?
void MainScan(Contents scan) {
#if DB
int debug = clock();
#endif
while (true) {
for (int y = scan.startY; y < scan.compareY; y++) {
for (int x = scan.startX; x < scan.compareX; x++) {
//SetCursorPos(x, y);
if (GetAsyncKeyState(VK_DELETE)) {
exit(0);
}
}
}
}
}

Answer 1

Here's how you use it: https://msdn.microsoft.com/en-us/library/windows/desktop/ms646293(v=vs.85).aspx
Here's a snippet of code from an old project of mine for a console based maze game:
Difficulty AskDifficulty() {
// xy norm = 1, 2 y++ for rest
point base(1, 2);
drawatxy(1, 2, '*');
while (GetAsyncKeyState(VK_RETURN)) // while it is being pressed, do not consider any input until we let go of the key
g_delay(0.001);
while (true) { // now we let go of it, consider inputs once more
if (GetAsyncKeyState(VK_RETURN) & 0x8000) {
switch (base.y) {
case 2:
return DIFF_EASY;
case 3:
return DIFF_NORM;
case 4:
return DIFF_HARD;
default:
return DIFF_INVALID;
}
}
else if (GetAsyncKeyState(VK_DOWN) & 0x8000) {
if (base.y < 4) {
drawatxy(1, base.y, ' ');
base.y++;
drawatxy(1, base.y, '*');
g_delay(0.125);
}
}
else if (GetAsyncKeyState(VK_UP) & 0x8000) {
if (base.y > 2) {
drawatxy(1, base.y, ' ');
base.y--;
drawatxy(1, base.y, '*');
g_delay(0.125);
}
}
else
_getch();
}
}