You know, I just realized after wrestling with the control source property of a textbox for more than a few minutes…you cannot set the control source to a cell on a sheet which has a name consisting of two words. If I tried to set the control source to
=Master Settings!A1
I get the error message “Invalid Property Value”. However, if I change the name of the sheet to MasterSettings and the control source to
=MasterSettings!A1
the control source takes just fine. Go figure…