How to map right Alt to Context-Menu key
You can use Autohotkey.
When you Launch Autohotkey, it will asks you the following:
To help you get started, would you like to create a sample script in the My Documents folder?
Press YES to create and display the sample script.
This will create a AutoHotkey.ahk
file in your Documents
Folder. Open AutoHotkey.ahk
with notepad and add the following to the end of the file.
RAlt::Appskey
Now run the script by opening the AutoHotkey.ahk
file with the Autohotkey application you installed before.
Now when you press the right Alt key you will see the ContextMenu.