hidden-cursor-sens.cpp

#include <Windows.h>
#include <iostream>

#define NEW_SENS 1

int main()
{
    std::cout << "Hello World!\n";

    unsigned original_sens;

    if (!SystemParametersInfoW(SPI_GETMOUSESPEED, 0, &original_sens, 0))
    {
        return 1;
    }

    // Simple check to see if we can even change the mousespeed...
    if (!SystemParametersInfoW(SPI_SETMOUSESPEED, 0, (PVOID)original_sens, 0))
    {
        return 1;
    }

    while (1)
    {
        CURSORINFO ci = { 0 };
        ci.cbSize = sizeof(ci);

        if (!GetCursorInfo(&ci) || ci.flags) // flags = 0 when cursor hidden
        {
            SystemParametersInfoW(SPI_SETMOUSESPEED, 0, (PVOID)original_sens, 0);
        }
        else
        {
            SystemParametersInfoW(SPI_SETMOUSESPEED, 0, (PVOID)NEW_SENS, 0);
        }

        Sleep(8);
    }

    return 0;
}