In RSView32 create a DDE Node. You can name it as you wish. The application would be "excel" without the quotes and the topic would be the spreadsheet you want to use.
For example:
["C:\My Doc Folder\My Spreadsheet.xls"]book1
OG
P.S. The spreadsheet must be open so make sure you have some sort of error checking to verift the spreadsheet is actually open.