Moving mouse position then back to beginning position - c++

Question

I'm trying to make keys move the mouse to a different position on the screen and then instantly back, at a very fast rate (50+ times per second) This is my current Code.
#include "stdafx.h"
#include <iostream>
#include <windows.h>
int main()
{
POINT p;
for( ; ; )
{
if (GetAsyncKeyState(0x57) < 0)
{
GetCursorPos(&p);
std::cout << "W key pressed";
SetCursorPos(0, 0);
SetCursorPos(p.x, p.y);
Sleep(100);
}
}
With this code it'll just change my mouse position then update as to where it was (I don't have free movement of my mouse and just keeps it at/around 0,0) If I put Sleep(100) at the end then it works pretty consistently but every ~10 seconds my mouse will get stuck at 0,0 again, the more I put up the sleep the less this happens, but why?
edit console app in Visual Studio

Answer 1

See documentation for GetAsyncKeyState
Return value
Type: SHORT
If the function succeeds, the return value specifies whether the key
was pressed since the last call to GetAsyncKeyState, and whether the
key is currently up or down. If the most significant bit is set, the
key is down, and if the least significant bit is set, the key was
pressed after the previous call to GetAsyncKeyState. However, you
should not rely on this last behavior; for more information, see the
Remarks.
Example
if (GetAsyncKeyState('W') & 0x8000)
{
std::cout << "W key pressed\n";
}
SetCursorPos(0,0) moves the cursor to top-left corner, while SetCursorPos(p.x, p.y) moves the cursor back to where it was when you called GetCursorPos. You won't see any changes to the mouse position.
It is not common to use these WinAPI functions in a console program.