Subject Re: how to handle missing optional arguments in a function From Bruce Beacham <bbeacham@no_plm_lowman.co.uk> Date Thu, 1 Oct 2020 22:46:19 +0100 Newsgroups dbase.getting-started Use false as a placeholder when calling a function where you want to provide a late-placed parameter. Within the function, dBASE will assign false to the variables in positions where a parameter is not provided.      Parameters provided are assigned to variables in turn.   It's logical! In PLUS, the construct  , ,  will throw an error. Bruce Beacham On 01/10/2020 21:26, Gaetano wrote: > > > Hi All, > > I have customized one webclass.cc function to add a text msg to > the errorMessage function: > > Function errorMessage( oErr, cMsg, cTitleBackColor, cTitleTextColor ) > > if you supply less than the total count of arguments, how does dBase > know which argument is supplied and which is omitted? > > In other words, if I only want to supply cMsg or only a cTitleTextColor > but no cTitleBackColor, how to I do that? Is there a standard > placeholder for empty arguments? > > would something like the following work? > > errorMessage(,"my message",,"red") > > If I have to test for argument types, how do I reference the "first > argument"? > > Cheers, > Gaetano. >