Executing an Excel Macro w/ Vbscript

I was just wondering if there was a way for a vbscript to execute an excel macro, short of using the sendkeys method to run it via the menu.

Code:

Set o_excel = CreateObject ("Excel.Application")
o_excel.visible = True
o_excel.workbooks.open c_hardsheet

This is the code I'm using to open the spreadsheet who's absolute path is contained in the constant c_hardsheet. Is there a property or method of either the excel application, workbook or worksheet objects that will execute a macro in this sheet?

Any and all help is appreciated.

 

For future reference this link helped me out immensely.