How do I insert a variable worksheet name into multiple excel formulas?

Question

I'm trying to setup an excel sheet that will have a drop down box in a cell at the top which will contain different worksheet choices that are available from my workbook. Once I choose a worksheet, I need this worksheet name to be referenced in many different excel formulas within this sheet.

Ex:

Choose an Application Group Filter:  *Drop Down Choices* Recap Filter
                                                         PB Filter
                                                         Membership Filter

Formula:

=COUNTIF('DropDownChoice'!AA:AA, 8)

I also want to have multiple worksheets that have this drop down box available at the top. Is this possible?

Answer 1

Use the INDIRECT() function

Example using your countif:

= COUNTIF( INDIRECT( CONCATENATE( dropdowncell, "!AA:AA") ,TRUE ), 8)

EDIT: Because you have space in your dropdown values you probably need

= COUNTIF( INDIRECT( CONCATENATE( "'", dropdowncell, "'!AA:AA") ,TRUE ), 8)