(X,Y) as a variable

[joey o.]

Hi,
I've been trying to assign a string variable which holds the x and y coordinates to a Pset function and can't do it without errors.here's an example:

strBlah = (356,789)
pset strBlah

If I can't make this work is there a way to parse the string so I can assign the variables back to seperate x and y values?
p.s.