Binary To Decimal Converter In Visual Basic NET

I wrote this program to ask the user to give a value in Binary and then the program will convert the binary number into decimal equivalent using Microsoft Visual Basic NET.

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Sample Program Output

Program Listing

Public Class Form1

    Public Function Bin_To_Dec(ByVal Bin As String)

        Dim dec As Double = Nothing

        Dim length As Integer = Len(Bin)

        Dim temp As Integer = Nothing

        Dim x As Integer = Nothing

        For x = 1 To length

            temp = Val(Mid(Bin, length, 1))

            length = length - 1

            If temp <> "0" Then

                dec += (2 ^ (x - 1))

            End If

        Next

        Return dec

    End Function

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

        If MsgBox("Are you sure you want to quit?", MsgBoxStyle.YesNo Or MsgBoxStyle.DefaultButton2, "Close application") = Windows.Forms.DialogResult.Yes Then

            Me.Close()

        End If

    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        Dim display As Double

        display = Bin_To_Dec(Val(TextBox1.Text))

        MsgBox("The Decimal Equivalent is " & display & ".", vbInformation, "The Result")

        TextBox1.Text = ""

        TextBox1.Focus()

    End Sub

End Class