Dynamic query and record source in a Form

[dudezzz]

I have Form A that has a combo box and a "Submit" button. When the user clicks on the Submit button it needs to open Form B. Recordsource of this Form B is "Query B"

Item selected on the combo box becomes the criteria for "Query B and Form B needs to be opened based on that criteria.

What is the easiest and fastest way (no dlookups please!) to do this?

If an illustration is possible through an example that will be wonderful.

Thanks in Advance.