FFT configuration

[ThankYou]

I'm a new in LabVIEW programming. I use FFT Spectral Measurement VI in my lab now. If I wanna change the frequency resolution and measurement range, I can't do it with this VI. Could you please tell me which VI I should use to customize frequency resolution and measurement range of FFT? For example, I just want to measure 0-200Hz.
BTW, in LabVIEW 7.1, which VIs or functions are high level or low level? How to tell that?
Thank you.

[rpursley8]

For a FFT, your data range is determined by your sampling rate. Your maximum frequency after the FFT is 2/fs where fs is the sampling frequency.

Your frequency resolution is determined by the length of your acquired signal. If you acquire one second of data, your frequency resolution is 1 Hz. If you acquire 100 ms of data, your frequency resolution is 10 Hz or 1/(100 ms).

To get a frequency range up to 200 Hz, your sampling rate must be 400 Hz.