Hi Steve,
Thank you for your details.
Currenlty there is no way to get information about the individual argument. In any formula that references the name, the string would be substituted before parsing and computing takes place.
Please refer this sample which list the formulas with arguments in dropdown list.
http://websamples.syncfusion.com/samples/Grid.Windows/34349_1/main.htmIn the sample, custom cell is created with a static field of type datatable. In the form load this table is filled with the syntaxes of the library functions from the FormulaEngine. This datatable is used to fill the dropdown listbox with the matched function syntax.
Kindly let us know if you need any further assistance.
Best Regards,
Jeba.