try using regex:

vb Code:
  1. Dim string_1 As String = "sometextblahblahdoodledooo<text>this is what i want</text>blahblahsomeothertext"
  2. Dim rx As New Regex("(?<=<text>).+?(?=</text>)")
  3. Dim string_2 As String = rx.Match(string_1).Value

don't forget to import regex:

vb Code:
  1. imports system.text.regularexpressions