Pass key event to a specific process

Let’s just go straightforward how to make “KeyEvent” to a specific process using C#.

1) Import libraries

using System.Diagnostics;
using System.Linq;
using System.Windows.Forms;

You need Windows.Forms to call SendKeys class method. If your program says it cannot find it, try “Add Reference” on your project properties.

(Optional) SetForegroundWindow

If you want to force bring the process, define this dll function

[DllImport("User32.dll")]
static extern int SetForegroundWindow(IntPtr point);

2) Generate Process and Send command

Process p = Process.GetProcessesByName("Notepad").FirstOrDefault();
 if (p != null)
 {
     IntPtr h = p.MainWindowHandle;
     SetForegroundWindow(h);
     SendKeys.SendWait("abcde");
     SendKeys.SendWait("^z");
}

First, find the process by name. ex) Notepad.

Second, if process was able to find “Notepad” process, call SetForegroundWindow() and call SendKeys.SendWait().

You can just pass String in certain way like “^z” will do Ctrl + Z like undo.

Check this link for more key combi info

Key combination Reference

Happy Hacking!