Accessing Data From Worksheets In Multiple Workbooks

I have read all the rules, and the guidelines for writting a thread title, and can only hope that my title meets those criteria (Dave, if they do not please do not ban me). I am fairly new to VBA, I have been able to edit other peoples code, and have created a few macros myself, and although I think I know how to use a loop and arrays, I sometimes lack some of the basics, this may be one such case. That said here is the problem I am facing.

I am creating a database, and as such I am sent several workbooks, with each workbook containning several worksheets. Within these workbooks, the naming convention of the worksheets is consistent, though each workbook may contain different number of worksheets. (the name of the worksheets represents a specific size/format).

What I have is a "Setup sheet" that I would like populated with all the data from specific worksheets in the various workbooks. So I would need to be able to get the macro to check all the workbooks, and if it finds a worksheet entitled "Sheet B" (for example) that it copies all that data into the "Setup sheet", and progresses onto the next workbook. I have the loop working and am fairly confident on this side of things, though where I am struggling is getting the Macro to know what worksheet to look at when going through the workbooks.

I need the macro to be fairly dynamic in which Worksheet it looks at so I don't want to simply hardcode the Worksheet name into the macro, rather I would like to be able to specify the worksheet name based on a cell value in the "Setup sheet". so going back to my earlier example if the cell value in the "Setup sheet" = "Sheet B" then the macro should get data from the worksheets entitled "SheetB" in the workbooks, if the cell value in the "Setup sheet" = "Sheet F" then the macro should get data from the worksheets entitled "Sheet F".