Following two functions are used to test change cell value and format. the
dropdown_test function changes the cell setting to dropdown, which works.

The second function tries to change the number format, and expect a
percentage format present. It doesn't work. Hope someone can tell me the
reason why it doesn't work.

Both functions locate in module in a test.xla file and called from Excel
User Defined category.

Function dropdown_test()
ActiveCell.Select
ActiveCell.Clear
With Selection.Validation
.Delete
.Add Type:=xlValidateList, Operator:=xlBetween,
Formula1:="a,b,c,d,e"
.IgnoreBlank = True
.InCellDropdown = True
End With
dropdown_test = "a"
End Function

Function numberformat_pc_test()
ActiveCell.NumberFormat = "0.00"
numberformat_pc_test = 0.234
End Function