Check for string????

Hi rkckjk;

This will do what you need.

Imports System.Text.RegularExpressions

        ' Test Data
        Dim input() As String = {"5555550129@archwireless.net5555550139@archwireless.net", _
            "5555550129@archwireless.com5555550139@archwireless.net"}
        ' The Regular Expression pattern to parse the input
        Dim pattern As String = "(\d+@archwireless.(?:net|com))(\d+@archwireless.(?:net|com))"
        Dim idx As Integer = 0

        For Each email As String In input
            ' Parse the input
            input(idx) = Regex.Replace(input(idx), pattern, "$1 $2")
            idx += 1
        Next

        ' Display Results
        MessageBox.Show(input(0) & Environment.NewLine & input(1))

Fernando

Sorry, I should have mentioned the string data is in a textbox and also archwireless is not a constant. It could be sprintpcs or other providers

You can't convert a textbox to an array

Same thing just different input and a small change to the pattern allowing any domain.

        Dim pattern As String = "(\d+@.+?\.(?:net|com))(\d+@.+?\.(?:net|com))"
        TextBox1.Text = Regex.Replace(TextBox1.Text, pattern, "$1 $2")

The question did not say that the text string was in a text box.

Sorry missed a space after the $1 below

        Dim pattern As String = "(\d+@.+?\.(?:net|com))"
        ' Should be this
        TextBox1.Text = Regex.Replace(TextBox1.Text, pattern, "$1 ")