Convert.ToInt32 (String, Int32) converts string in a base to 32-bit signed integer.
Module Example Public Sub Main() Dim value As String = Convert.ToString(CLng(Integer.MaxValue) + 1, 16) Try Dim number As Integer = Convert.ToInt32(value, 16) Console.WriteLine("0x{0} converts to {1}.", value, number) Catch e As Exception Console.WriteLine("Exception") End Try End Sub End Module