Convert a string into a 64-bit signed integer value using the Int64.Parse(String) method : Data Type Convert « Data Type « VB.Net Tutorial

1. VB.Net Tutorial
2. Data Type
3. Data Type Convert

Module MainClass
   Public Sub Main()
      Convert(" 1")
   End Sub

   Private Sub Convert(value As String)
      Try
         Dim number As Long = Int64.Parse(value)
         Console.WriteLine("Converted '{0}' to {1}.", value, number)
      Catch e As FormatException
         Console.WriteLine("Unable to convert '{0}'.", value)
      Catch e As OverflowException
         Console.WriteLine("'{0}' is out of range.", value)      
      End Try
   End Sub
End Module