C# InputSimulator wrapper - how to use it?

Question

I want to simulate keyboard click for a external program.I've tried SendMessage, PostMessage, SendKeys but they do not send the key to one specific program. So i wanted to try SendInput and i have downloaded a good wrapper for SendInput - http://inputsimulator.codeplex.com/

i have added the assembly to my project but i cannot yet start using any of the functions...

What i have to do? What "Using" should i add?

Answer 1

I believe you need a

Using WindowsInput; 

If that's not it, you can view it in the Object Browser and see the namespace. Just right click the reference in solution explorer and click browse.

Answer 2

You can simulate keyboard input to a program like this:

• bring the program you want to send keys to the foreground using SetForegroundWindow from user32.dll

• use the SendKeys.SendWait Method to send the actual key to the program window

Example code (launch notepad before testing):

using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace SendKeyboardInput
{
    public class SendKey
    {
        [DllImport("user32.dll")]
        public static extern bool SetForegroundWindow(IntPtr hWnd);

        public void Send()
        {
            System.Diagnostics.Process[] p = System.Diagnostics.Process.GetProcessesByName("notepad"); //search for process notepad
            if (p.Length > 0) //check if window was found
            {
                SetForegroundWindow(p[0].MainWindowHandle); //bring notepad to foreground
            }

            SendKeys.SendWait("a"); //send key "a" to notepad
        }
    }
}