Convert hex string to int64
Module Example Public Sub Main() Dim hexStrings() As String = { "8000", "0FFFFFFF", _ "f0000001000", "00A30", "D", "-13", "GAD" } For Each hexString As String In hexStrings Try Dim number As Long = Convert.ToInt64(hexString, 16) Console.WriteLine("Converted '{0}' to {1:N0}.", hexString, number) Catch e As Exception Console.WriteLine("Exception") End Try Next End Sub End Module