The idea for this UDF (user defined function) came from this article which I saw in another forum...
Excel udf: Lookup and return multiple values concatenated into one cell | Get Digital Help - Microsoft Excel resource
This is actually an old article that someone just commented on which, in turn, brought it to the top of that forum's "Recent Comments" list and, hence, to my attention. When I looked at the article, I decided the UDF presented by that programmer could be expanded to make it more flexible, hence this current article by me (you should follow the above link in order to see the type of data being processed and the expected resulting output from it). Here is the code I came up with...
The first three arguments are required. The first argument is the text you want to search for. The second argument is the range to be searched... this range can either be a column of cell references or a row of cell reference (it cannot be a two-dimensional array of cells though). The third argument is the range from which the matching results will be taken from... this range can be a column of cell references or a row of cell reference (it cannot be a two-dimensional array of cells though). Note that while normally the orientation of the search and result ranges will be the same (easier to coordinate between the two I would think), this is not a requirement... one can be a reference to a row of cells and the other can be a reference to a column of cells.Code:Function LookUpConcat(ByVal SearchString As String, _ SearchRange As Range, _ ReturnRange As Range, _ Optional Delimiter As String = " ", _ Optional MatchWhole As Boolean = True, _ Optional UniqueOnly As Boolean = False, _ Optional MatchCase As Boolean = False) Dim X As Long, CellVal As String, ReturnVal As String, Result As String If (SearchRange.Rows.Count > 1 And SearchRange.Columns.Count > 1) Or _ (ReturnRange.Rows.Count > 1 And ReturnRange.Columns.Count > 1) Then LookUpConcat = CVErr(xlErrRef) Else If Not MatchCase Then SearchString = UCase(SearchString) For X = 1 To SearchRange.Count If MatchCase Then CellVal = SearchRange(X).Value Else CellVal = UCase(SearchRange(X).Value) End If ReturnVal = ReturnRange(X).Value If MatchWhole And CellVal = SearchString Then If UniqueOnly And InStr(Result & Delimiter, Delimiter & _ ReturnVal & Delimiter) > 0 Then GoTo Continue Result = Result & Delimiter & ReturnVal ElseIf Not MatchWhole And CellVal Like "*" & SearchString & "*" Then If UniqueOnly And InStr(Result & Delimiter, Delimiter & _ ReturnVal & Delimiter) > 0 Then GoTo Continue Result = Result & Delimiter & ReturnVal End If Continue: Next LookUpConcat = Mid(Result, Len(Delimiter) + 1) End If End Function
The remaining arguments are all optional. The fourth argmument, a String, is the text (one or more characters) that you want to be the delimiter between the concatenated text that is found during the lookup (the default value is a space character). The fifth argument, a Boolean, determines whether the lookup should be trying to match the entire cell value or only part of the cell value (the default value is True meaning the lookup will have to match the entire cell value). The sixth argument, a Boolean, determines if the concatenated list that is returned should allow duplicated values to be listed or whether a found value should only be listed one time, that being the first occurrence in the range (the default value is False meaning found values will be listed as many times as they are found within the search range). The seventh argument, a Boolean, determines whether the lookup process will be case sensitive or not (the default value is False meaning the searched for text does not have to be of the same case as the text being searched).
That is pretty much it. Hopefully my explanation has been clear enough but, if not, please feel free to ask me go into more detail on any parts that seem "murky" to you.
HOW TO INSTALL UDFs
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If you are new to UDFs, they are easy to install and use. To install it, simply press ALT+F11 to go into the VB editor and, once there, click Insert/Module on its menu bar, then copy/paste the above code into the code window that just opened up. That's it.... you are done. You can now use LookUpConcat just like it was a built-in Excel function.
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