Convolution Via the frequency domain??????

Hi,
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I am beginner in max msp and need some direction .. please help ?
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I need to perform convolution via the frequency domain.
I have read a lot of books/journals of this subject and feel confident I know how to do on paper.
However when it comes to max msp I am completely lost. I gather I will need to use the pfft~ object.
But how do you implement the overlap-windowing ..?
The help files on Max Msp help me only a little.
Could anyone point me in the direction of relevant journals/websites that show examples of convolution.
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Many Thanks
aly