I need some help trying to generate a graph from the input of a ComboBox (dropdown list) and some check boxes. The check boxes identify a particular sheet. The ComboBox value selects the same row of data from each sheet to graph. By selecting one or more sheets (Checkbox is checked), I want to graph a particular piece of data, which I select from the ComboBox. How do I read the value from the ComboBox and use that for input into the graph?