GetAsyncKeyState....

Hi
I am using GetAsyncKeyState to move players around in my game(same keyboard), but whenever one presses a key, the other players movement is interfered....how can I prevent this??

Code:

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#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);
}

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What do you mean by interfered. An example would help.

ØØ

fx. when one player is holding down the left key and player two presses the w key both players stop moving.