Detect List

Helo all
sir here im having a problem with my result i have 3 list view
1 for old list data 2nd for new + old list data and 3rd for my result
i want add new data in my 3rd listview wich not contain my olds list data
for exmple:

Code:

---

Dim A,B,C
A = 123456
B = 12345678910

---

NOW I WANT IN C = 78910 ITS MY RESULT

I SIMPLY MAKE A CODE BT ITS NOT WORK

Code:

---

Private Sub Command1_Click()
For I = 1 To ListView2.ListItems.Count
ListView3.ListItems.Add , , ListView2.ListItems(I)
Next
On Error Resume Next
    For I = 1 To ListView1.ListItems.Count
    For j = 1 To ListView2.ListItems.Count
   
    If ListView1.ListItems(I) = ListView2.ListItems(j) Then ListView3.ListItems.Remove (I)
   
    Next j
    Next I
   
End Sub

Private Sub Form_Load()
For I = 1 To 20
ListView1.ListItems.Add , , I
Next I
For I = 1 To 30
ListView2.ListItems.Add , , I
Next I
End Sub

---

Please help me out .... thanks in advance

First thing to do is to remove the 'On Error Resume Next' statement - it's hiding an 'Index out of Bounds' error.

It's easier to not add the item to ListView3 if it appears in ListView1 and ListView2

Code:

---

Option Explicit

Private Sub Command1_Click()
Dim i As Integer
Dim j As Integer
Dim boDup As Boolean
For i = 1 To ListView2.ListItems.Count
    boDup = False
    For j = 1 To ListView1.ListItems.Count
        If ListView1.ListItems(j) = ListView2.ListItems(i) Then
            boDup = True
        End If
    Next j
    If boDup = False Then
        ListView3.ListItems.Add , , ListView2.ListItems(i)
    End If
Next
End Sub

Private Sub Form_Load()
Dim i As Integer
ListView1.ColumnHeaders.Add , , "Column"
ListView2.ColumnHeaders.Add , , "Column"
ListView3.ColumnHeaders.Add , , "Column"
For i = 1 To 20
    ListView1.ListItems.Add , , i
Next i
For i = 1 To 30
    ListView2.ListItems.Add , , i
Next i
End Sub

---

thankyou so much sir its work nicely.. :x