How to rotate the N64 control stick on emulator?

I'm currently playing SM64 on emulator, but i can't defeat Bowser because i don't know how to "rotate" the control stick on the keyboard. Please help.
 
I won't pretend to know how this is usually done or if it works at all but try pressing the arrow or ASDW-keys (or whatever else you may use) in this fashion:

rotatestickkeys.gif


You should always have at least one key pressed this way, and only release a key after pressing the next.
 
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