How to use sendkeys for controlling NX?

Hey everybody,

I try to use sendkeys for controlling Siemens NX 9 by Matlab! I already opened NX... Now I would like to create a new file by strg + n! My code:

status = system ('C:\Program Files\Siemens\NX 8.5\UGII\ugraf.exe');

What is my next step?

I've already tried to use

e = actserver

but unfortenately it didn't work!

Thanks for your help!

niko9310