Decimal place

Hi all, I have just started to learn vb.net and one of my first programmes that I have decided to write is a calculator, the only thing is I can't seem to figure out how to code my decimal point button to covert intergers to doubles.

I'd be greatful for any help, here's my code:

VB Code:

Public Class Form1
    Inherits System.Windows.Forms.Form
    Dim total1 As Integer
    Dim total2 As Integer
Private Sub cmd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmd4.Click
 
    End Sub
 
    Private Sub Button10_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmd2.Click
 
    End Sub
 
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
 
    End Sub
 
    Private Sub cmdEquals_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnEquals.Click
 
                total2 = total1 + Val(txtDisplay.Text)
                txtDisplay.Text = total2
 
    End Sub
 
    Private Sub cmdPlus_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnPlus.Click
        total1 = total1 + Val(txtDisplay.Text)
 
        txtDisplay.Clear()
    End Sub
 
    Private Sub btnBkSp_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnBkSp.Click
  
        txtDisplay.Text = Mid(txtDisplay.Text, 1, txtDisplay.Text.Length - 1)
    End Sub
 
    Private Sub cmd0_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmd0.Click, cmd1.Click, cmd2.Click, cmd3.Click, cmd4.Click, cmd5.Click, cmd6.Click, cmd7.Click, cmd8.Click, cmd9.Click
        txtDisplay.Text = txtDisplay.Text + sender.Text
 
    End Sub
 
    Private Sub btnReset_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnReset.Click
        total1 = 0
        total2 = 0
        txtDisplay.Clear()
 
    End Sub
 
    Private Sub txtDisplay_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtDisplay.TextChanged
 
 
            txtDisplay.TextAlign = HorizontalAlignment.Right
 
            If txtDisplay.Text = "" Then
            Me.btnBkSp.Enabled = False
            Me.btnPlus.Enabled = False
        Else
            Me.btnBkSp.Enabled = True
            Me.btnPlus.Enabled = True
        End If
    End Sub
 
 
    Private Sub btnPoint_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnPoint.Click
 
    End Sub
End Class

I don't really think any sort of conversion is necessary or advisable. You should work with Decimal objects all the time regardless. No Integers and no Doubles. If you want to convert the Text of a TextBox to a Decimal object then you should use Decimal.TryParse. There are also Integer.TryParse and Double.TryParse methods if you were going to use those types but Decimal is the best option. It supports fractional values that Integer doesn't and it's no susceptible to round-off errors like Double.

Note that when I say work with Decimals all the time I mean for this particular project. Integers and Doubles are both widely used and are the two most common numeric types. For this particular project though, Decimal is most appropriate.