Concat fields separated by commas

I have a database with several fields I need to combine, separated by commas. The problem is some of these fields will be null and I don't want to run into the issue where I see the following:

data1, data2, , ,

I want it to display as:
data1, data2

in addition if data1 is empty, I want to suppress the entire field.

Anyone able to tell me how to do this?
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You would have a formula field like....

stringvar mlist;
if isnull({table.data1}) then

if mlist="" then
//do nothing
(if isnull({table.data2}) then mlist:=mlist else  mlist:=mlist & "," & {Table.Data2};
if isnull({table.data3}) then mlist:=mlist else  mlist:=mlist & "," & {Table.Data3};
if isnull({table.data4}) then mlist:=mlist else  mlist:=mlist & "," & {Table.Data4}

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DarkHoundAuthor Commented:
hmm I don't see a formula field option
DarkHoundAuthor Commented:
Nevermind, I figured it out. Thanks!
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