How do I sendkeys to a Metro Application like Netflix?

In VB.net, how do I sendkeys to a metro application like Netflix.  I am referencing http://msdn.microsoft.com/en-us/library/ms171548(v=vs.110).aspx which is for the calculator desktop application.  How do I do the same for Netflix.

Dim calculatorHandle As IntPtr = FindWindow("CalcFrame", "Calculator")

I believe the above line of code needs to be altered but i do not know what to insert for the two arguments.