, , .
Dim formulaString as String
formulaString = ThisWorkbook.Sheets(1).Range("A1").Formula
formulaString = Replace(formulaString,"CBK","ALBK")
ThisWorkbook.Sheets(1).Range("A1").Formula = formulaString
Dim wb as workbook
Dim i as integer
set wb = thisworkbook 'or whatever you choose to open here
for i = 1 to wb.worksheets.count
wb.sheets(i).range("A1").Formula = Replace(wb.sheets(i).range("A1").Formula,"CBK","ALBK")
next i