Member Avatar for Lemony Lime

I've recently started college at Digipen, and have developed carpal tunnel already from all the writing/coding/etc... but fortunately for me, I'm learning to be a programmer, and have already made a few programs to assist with things like opening command prompt/bat files faster/without clicking, etc.

Since clicking the mouse is significantly more difficult for me than typing, I was wanting to make a simple program that would just run in the background, and click the mouse for me any time I press a specific key on the keyboard. I don't really know where to start with this though, and have never used anything but standard c so far. Also, being able to move the mouse with keypresses would be handy at times as well.

Thanks for the help. :)

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As described, the goal is a tiny background helper that turns keystrokes into mouse clicks and (optionally) moves the pointer. As pointed out, the first step is reliable key detection; as noted, this touches Win32-level APIs. The clean, efficient pattern is event-driven: install a global hotkey or a low-level keyboard hook so your app wakes only when a relevant key event occurs, and synthesize mouse input with the modern input-injection API rather than busy polling.

A compact implementation plan:

  • Detection: use a system-wide hotkey for simple combos, or a low-level keyboard hook when you need per-key/hold behavior and fine control.
  • Synthesis: inject clicks with the standard input-synthesis API and move the cursor with the cursor-position API or the same input-synthesis calls.
  • App host: run as a hidden GUI or a message-only window so a message loop can receive hotkey or hook callbacks without a visible UI.
  • Behavior handling: implement debouncing and an adjustable repeat/turbo rate so holding a key produces controlled clicks instead of runaway input.
  • Deployment: autorun via the Startup folder or registry if desired; do not use an interactive service (session 0 isolation makes that unsuitable).

Troubleshooting & cautions:

  • Avoid tight polling loops (they burn CPU and are less responsive). Use event callbacks.
  • Synthetic input may not affect elevated processes unless your helper runs at the same integrity level (UAC). Full-screen games or anti-cheat/protected apps may ignore injected events.
  • Test on both 32- and 64-bit builds if you interact with other processes; hook behavior can differ by architecture.

If writing the helper sounds like overkill, scriptable tools (AutoHotkey) or small external devices (foot pedal, trackball) provide immediate, low-effort alternatives and may reduce strain without writing system code.

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Member Avatar for Lemony Lime

Oh and I should probably mention that I will be using this on both windows vista and 7, and of course I'll be the only one using it.

Member Avatar for VatooVatoo

In windows you need to know system programming for using mouse event.

Member Avatar for np complete

There is a function called GetAsyncKeyState() in windows.h header. Example :

      if(GetAsyncKeyState(VK_LSHIFT))
      {
         printf("The left shift Has Been Pressed\n");
      }

Here is the definiton : GetAsyncKeyState() is a function that returns a SHORT value (on 32bit processors that is a 2 value, half the size of a normal int). The SHORT value will be non-zero (positive) if the key specified is pressed down at the instant the functions is called.

Now this function also works with mouse buttons. Check this page to learn more about GetAsyncKeyState()

Generally GetAsyncKeyState()is a function used often in hacks, for navigating menus, detecting key presses in the case of nonmenu hacks and so on.

You can also link mouse_event() to GetAsyncKeyState(), but this part, you have to think it on your own :)

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