Create a report containing the info you want. In your case it may just be the contents of the subform. When the user selects your print button, open the report and set the where (or filter) part of the OpenReport argument. For example, suppose the field that uniquely identifies the record in the subform is the employee ID. Your OpenReport command would look like this:
Docmd.OpenReport "rptYourReport",,,"lngEmployeeID = " & Me!subFormName.Form!lngEmpolyeeID