compare 2 files

i need an app which can compare 2 files.

say i have tewo text files; file 1 and file 2

file 1 is the main file and file 2 is a file which i add lines into. so if i load file 1 in text box 1 and then load file 2 in text box 2 and then i would like to click compare and would like it to not do anything to the data in file 1 nor the text box 1 but to compare the lines in text box 2 with text box 1 and remove any duplicates.


file 1
a 1
ab 2
abc abc
abcd 12345
abcde
abcdef


file 2

ab 2
asd
wer
abcd 12345
abc abc
ab 2

after clicking remove duplicated i would like it to that the results from text box 2 if duplicates are removed from text box 2 not 1

text box 2 final
asd
wer


can any one help?

You can split text in both textboxes into 2 arrays then compare them to remove duplicate lines.

This is another way:

Code:

---

Private Sub Command1_Click()
    Dim sText1 As String, sText2 As String
    Dim sItems() As String, i As Long
   
    '-- copy and add first and last delimiters
    sText1 = vbLf & Text1.Text & vbCr
    '-- split Text2.Text by vbCrLf
    sItems = Split(Text2.Text, vbCrLf)
    '-- check existing of each item
    sText2 = ""
    For i = 0 To UBound(sItems)
        '-- surround sItems(i) with vbLf and vbCr then check
        If InStr(sText1, vbLf & sItems(i) & vbCr) = 0 Then
            '-- sItem2(i) does not exist in sText1, add it to sText2
            sText2 = sText2 & vbCrLf & sItems(i)
        End If
    Next
    '-- remove leading vbCrLf and copy to Text2.Text
    Text2.Text = Mid$(sText2, 3)
End Sub

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