Solution File
The directory and file name of your Visual Studio Solution (.sln) file.
Configuration
Which Configuration of the solution to build. eg. "Release" or "Debug"
Using
The Using drop down is populated with any property collector whose namespace matches the pattern defined by the Visual Studio .NET Action. The pattern for this action is ^VisualStudio\..*
If you create a property collector for this action, make sure you select the VisualStudio type and give it a name that will match the pattern above in blue. Example names listed here, search the table's Plugin column for "Visual Studio".
For more in-depth explanations on property collectors see Managing Property Collectors.
Alternatively, you can select the Custom option from the Using drop down list and specify a path in the resulting input field that will be displayed. Please read Why it's a good idea to use a property collector before using this option.