Highlight numeric value in a textbox.

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VS2008

VB

.NET

Visual-Studio

, +

I am using visual studio 2010 (vb.net- windows form ).

I have a text box which consist of number's date and string.
i need to highlight all numeric values and date in that text box and need an option to change the value on mouse click . (ie No changes in string content)

for example

let value in text box be

"Hi my name is Sidharth. I'm 26 yr old . my dob is 22/03/1990"

when value is loaded to text box
it should display as

"Hi my name is Sidharth. I'm 26 yr old . my dob is 22/03/1990"

on mouse click or mouse focus i need an option to change.

Dim TextToFormat As Integer
       Dim TextFormat As String
       TextFormat = 1
       TextToFormat = "Hi my name is Sidharth. I'm 26 yr old . my dob is 22/03/1990"
       Dim count As New List(Of Integer)()
       For i As Integer = 0 To rText.Text.Length - 1
           If rText.Text.IndexOf(TextToFormat, i) <> -1 Then
               'If the word is found add the index to the list
               count.Add(rText.Text.IndexOf(TextToFormat, i))
           End If
       Next

       Try
           For i As Integer = 0 To count.Count - 1
               rText.[Select](count(i), TextToFormat.Length)
               Select Case TextFormat
                   Case 1
                       rText.SelectionFont = New Font(rText.Font.FontFamily, rText.Font.Size, FontStyle.Italic)

                   Case 2
                       rText.SelectionFont = New Font(rText.Font.FontFamily, rText.Font.Size, FontStyle.Italic)
               End Select
               count.RemoveAt(i)
           Next
       Catch
       End Try

in this im searching a text in txtbox and formatting the text
bt i need to get all numerical values.