Passing Enum values to Excel Function

I'm writing an Excel UDF and would like to make it where valid values are presented to the user (Like VB does when you start typing a function there) OR let the user use descriptive names(like VB does with it's constants)

Here's a code paste:

Public Enum SheetTypes
st_Inventory_Adjusts = 0
st_Receipts = 1
st_Shipments = 2
End Enum


Public Function Sheet_Sum(ByVal eSheetType As SheetTypes, strCellName As String) As Long
.
.
.
.
end function

I get a dropdown when I use the function from within the VB editor, but I get nothing when I type the function in a spreadsheet cell. Not even a tooltip popup. (Although passing 0,1,2 work just fine)

Is there a way to either display the enum values like VB does, or have these be useable via named constant name?

Thanks!