For VOR navigation, first tune the NAV 1 radio to the frequency of the VOR.  You could turn on the "IDENT" listen on the communication source select panel to check the morse code identifier to verify you have tuned in the correct station, but I don't know if the CS 727 simulates this function.   Next, rotate the  course deviation indicator (CDI) on the horizontal situation indicator (HSI, compass looking gauge below the attitude direction indicator, ADI) to the desired course to the VOR.  Now you will get course deviation indications from the CDI needle on the HSI, and if the VOR has DME (distance measuring equipment) you will get a distance reading to the station on the upper left corner of the HSI and in the DME indicator window down and to the right.  

I recommend reading up on VOR navigation and/or doing the VOR tutorial that is in the FSX lessons section.