Is there a universal method to send key or mouse input to any application from C#?

Question

I need method or group of them to send signals to any application (browsers, games, et cetera) about mouse movement or key input.

I can easly retrieve an IntPtr to any process, but I don't know what library or function I must use next.

I know only about SendMessage/PostMessage functions from user32.dll, but these functions can send messages only to applications with standard message loops and it doesn't work with DirectX applications. And I've noticed that something like this:

PostMessage(pFoundWindow, WM_KEYDOWN, (IntPtr)VK_RIGHT, (IntPtr)0);
Thread.Sleep(150);
PostMessage(pFoundWindow, WM_KEYUP, (IntPtr)VK_RIGHT, (IntPtr)0);  

sends messages slower than DirectInput in and does not allow player to send, for example, left arrow and space, even in threads.

Answer 1

I am not sure what you can do about mouse movement. But for the keyboard, have you tried SendKeys?

I have a friend using SendKeys with speech recognition to do voice commands in StarCraft2. But I am not sure if it works with every game.

Answer 2

You can create a simple script in like 2 minutes with AutoHotKey_L or AutoIt...
and then call the script in your C# project.

Both have support for almost any mouse/key movement or simulation you can think of.