This post describes how to filter values existing only in one out of two cell ranges. See picture.

This udf is not case sensitive

Excel user defined function

Function Filter_Values(rng1 As Variant, rng2 As Variant) As Variant

' This udf filter values that exists only in one out of two ranges

Dim Value As Variant
Dim temp() As Variant
Dim Test1 As New Collection
Dim Test2 As New Collection
ReDim temp(0)

 rng1 = rng1.Value
 rng2 = rng2.Value

On Error Resume Next
For Each Value In rng1
 If Len(Value) > 0 Then Test1.Add Value, CStr(Value)
Next Value

For Each Value In rng2
 If Len(Value) > 0 Then Test2.Add Value, CStr(Value)
Next Value

Err = False
For Each Value In Test2
 If Len(Value) > 0 Then Test1.Add Value, CStr(Value)
 If Err Then
  Test1.Remove Value
 End If
 Err = False
Next Value

For Each Value In Test1
 temp(UBound(temp)) = Value
 ReDim Preserve temp(UBound(temp) + 1)
Next Value
On Error GoTo 0

Filter_Values = Application.Transpose(temp)

End Function

How to implement user defined function in excel

1. Press Alt-F11 to open visual basic editor
2. Click Module on the Insert menu
3. Copy and paste the above user defined function
4. Exit visual basic editor
5. Select sheet1
6. Select cell range A1:A5000
7. Type =Filter_Values(Sheet2!A1:J500, Sheet3!A1:J500) into formula bar and press CTRL+SHIFT+ENTER

The excel file contains 5000 random values in each range.

Download excel sample file for this tutorial.

Compare two ranges and extract not common values-udf.xls (0,9 MB)

(Excel 97-2003 Workbook *.xls)