Sending keystrokes to a program

Question

In window form, I made a button and I'm trying to make it send F1 to a specific window (Such as FireFox, My Computer, etc...)

My questions are :

• How do I do it by the window's name? (such as "Mozilla Firefox")
• How do I do it by the process's name? (such as firefox.exe)

Answer 1

By Window name:

[DllImport("User32.dll")] 
static extern IntPtr FindWindow(string lpClassName, string lpWindowName);  
[DllImport("User32.dll")] 
static extern int SetForegroundWindow(IntPtr hWnd);

IntPtr ptrFF = FindWindow(null, "Mozilla Firefox");
SetForegroundWindow(ptrFF);
SendKeys.SendWait("{F1}");

By Process name:

Process proc = Process.GetProcessesByName("firefox")[0];
IntPtr ptrFF = proc.Handle;
SetForegroundWindow(ptrFF);
SendKeys.SendWait("{F1}");