Help Using combobox in a select statement variable

[cibb]

I'm creating a small App that will list values from a mysql database to a combobox. The user will select one of those values then click a button. This button will need to get the value selected from the combobox. It will then perform another select statement using the value in the combobox as a variable in the select statement and then execute a windows shell command.

I've got a sql select statement listing values in a tkinter combobox.

I'm having trouble with the combobox. Do I bind or get the value?