How Do I Make Multiple Query in VB.Net to Crystal Reports

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VB

VS2010

CrystalReports

i want to make a report that contain 5 column.
but there is a problem, because each column is made from different query.
so there are 5 query in my case.
and i want to control the query from the code editor, because some parameter like "where" query must be get from a combobox

what should i do to solve this?
i try to use command (in database fields menu in crystal report).
this way can make 5 column from 5 different query, but i can't control it from code editor.

anyone can't help me?