Hi Rob,
The tabs are text, there is no getting around that so there is
no problem using them as text in a lookup. Perhaps if you
give a bit of code where you have a problem we could help you
better. In other words you can usually try something faster
than asking a question and waiting for an answer. In any case
converting to numbers or to next shouldn't be a big deal. (Though
importing a CSV file appears to be an exception.)
obtain worksheet name
=MID(CELL("filename",A1),FIND("]",CELL("filename",A1))+1,255)
or in VBA
SheetName = Application.Caller.Parent.Name
see " Examples of assigning a sheetname" on my
http://www.mvps.org/dmcritchie/excel/sheets.htm
Your question is being answered in a newsgroup. Having to filter out
such sites as you are using makes web searches a more difficult.