C# Stimulation mouse / keyboard!

Hello!

1. I have problem! How i can stimulate keyboard and mouse on No-Active window?
On active window i use this code:
Code:
// Get a handle to an application window.
[DllImport("USER32.DLL", CharSet = CharSet.Unicode)]
public static extern IntPtr FindWindow(string lpClassName,
string lpWindowName);

// Activate an application window.
[DllImport("USER32.DLL")]
public static extern bool SetForegroundWindow(IntPtr hWnd);
&&

Code:

	    IntPtr calculatorHandle = FindWindow(null, "MyGame");

            // Verify that game is a running process.
            if (calculatorHandle == IntPtr.Zero)
            {
                MessageBox.Show("Your game is not running!");
                return;
            }

            // Make game the foreground application and send it 
            // a set of calculations.
            SetForegroundWindow(calculatorHandle);
            System.Threading.Thread.Sleep(500);
            SendKeys.SendWait("Hello!");
            System.Threading.Thread.Sleep(500);
            SendKeys.SendWait(" How are");
            System.Threading.Thread.Sleep(1000);
            SendKeys.SendWait(" You");
            System.Threading.Thread.Sleep(200);
            SendKeys.SendWait("?");

But it works only on the active window. When i minimize game i hear 'Beeps - "its: Wrong song - Error ^^"'

2. How i can stimulate clicked mouse on XYZ position, on Active && no-active window?