UFT Pro (LeanFT) .NET SDK Reference, Version 14.03
PressKey Method
Presses the specified key using a keyboard scan code.
Overload List
OverloadDescription
PressKey(Byte)Presses the specified key using a keyboard scan code. Supports scan code set 1, such as the list shown at: http://www.win.tue.nl/~aeb/linux/kbd/scancodes-1.html 
PressKey(Keys)Presses the specified key using a keyboard virtual key.