Question: Maplet Builder Question

I am "playing" around with the Maplet Builder and I am having some problems:
Let say I have three separate vector columns with data loaded in maple ie A, B and C.

i) I want the user of the maplet to be able to select ie highlight a vector from the three
available vectors which are presented in a drop down box.

ii) A button when clicked on plots the data in the selected vector.


How can I do this with the Maplebuilder??  I will need step-by-step instructions.
Thank you for your cooperation.

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