How can I send keypresses to a running process object?

Question

I am trying to make C# launch an application (in this case open office), and start sending that application keypresses such that it would appear as though someone is typing.

Answer 1

I did this using SetForegroundWindow and SendKeys.

I used it for this.

[DllImport("user32.dll", ExactSpelling = true, CharSet = CharSet.Auto)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool SetForegroundWindow(IntPtr hWnd);

public void SendText(IntPtr hwnd, string keys)
{
    if (hwnd != IntPtr.Zero)
    {
        if (SetForegroundWindow(hwnd))
        {
            System.Windows.Forms.SendKeys.SendWait(keys);
        }
    }
}

This can be used as simply as this.

Process p = Process.Start("notepad.exe");
SendText(p.MainWindowHandle, "Hello, world");