title: How to send keystrokes to application UI automation -C#
body: <p>i need to find out automationid for key board values? how to send keystrokes to application UI automation? i need to automate page up and page down function in key board. What is the best way to do 
  it? </p>
  
  <p><strong>EDIT:</strong>
  in my application following the process. Assume end user open MS Word document with 5 pages and he presses page up and page down buttons to move within these pages. i want to automate this scenario using c#. currently i have uses UIAutomationClient.dll and UIAutomationTypes.dll. can i uses these?</p>