See the help for Functions
You are just talking about optional arguments.
Function MyFunc(MyStr As String, Optional MyArg1 As _ Integer = 5, _
Optional MyArg2 = "Dolly")
' The function can be invoked as follows:
RetVal = MyFunc("Hello", 2, "World") ' All 3 arguments supplied.
RetVal = MyFunc("Test", , 5) ' Second argument omitted.
' Arguments one and three using named-arguments.
RetVal = MyFunc(MyStr:="Hello ", MyArg1:=7)
The arglist argument has the following syntax and parts:
[Optional] [ByVal | ByRef] [ParamArray] varname[( )] [As type] [=
Optional Optional. Indicates that an argument is not required. If
used, all subsequent arguments in arglist must also be optional and declared
using the Optional keyword. Optional can't be used for any argument if
ParamArray is used.
> Excel-97 (SR-2)
> In general I would like to write macros that can be overloaded, for
> example Hyperlink() has an optional displaytext field.
> HyperLink( Filename)
> HyperLink( Filename, DisplayText)
> Please could someone post a short, useful macro that does such a
> thing, rather than give a description of how to do so.
> I have searched the online help for "overloading" and "arguments" but
> nothing useful is shown there.