Using FPGA Interface Functions pallete

I am using PCI-5640R  and PXI-5600. I want to use "Scaled Window" and "FFT" exspress VIs of "FPGA Math & Analysis" Functions Pallete in my "FPGA VI" and "FFT to Spectrum" VI  of "FPGA Interface" in my "Host VI".
Can any one post some example code in which these three subVIs are used.
Thanks in advance.
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