How to Make a Services Calculator and Discount in VB.Net

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This tutorial is all about How to Make a Services Calculator and Discount in VB.Net. With this tutorial you can Make a Services Calculator and Discount in VB.Net. easily. So let’s get started

  • First is open the Visual Basic, Select File on the menu, then click New and create a new project.

  • Then a New Project Dialog will appear. You can rename your project, depending on what you like to name it. After that click OK

  • Design your form like this just like what I’ve shown you below.
    Add 5 TextBoxes, 8 Labels & 4 Buttons from the Toolbox.
  • After Designing your form, Add this code to the button.
  • Calculate Button Code.
    [vbnet]
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    Try
    Label5.Text = “Sub Total: ” & (Val(TextBox1.Text) + Val(TextBox2.Text) + _
    Val(TextBox3.Text) + Val(TextBox4.Text))
    Label7.Text = “Total: ” & (Val(TextBox1.Text) + Val(TextBox2.Text) _
    + Val(TextBox3.Text) + Val(TextBox4.Text)) – (Val((Val(TextBox1.Text) _
    + Val(TextBox2.Text) + Val(TextBox3.Text) _
    + Val(TextBox4.Text))) * Val(TextBox5.Text / 100))
    Label8.Text = “Discount: ” & (Val((Val(TextBox1.Text) + Val(TextBox2.Text) _
    + Val(TextBox3.Text) + Val(TextBox4.Text))) * Val(TextBox5.Text / 100))
    Catch ex As Exception
    MsgBox(“Please Enter Valid Inputs”)
    End Try
    End Sub
    [/vbnet]
  • Clear Button Code.
    [vbnet]
    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
    TextBox1.Clear()
    TextBox2.Clear()
    TextBox3.Clear()
    TextBox4.Clear()
    TextBox5.Clear()
    Label5.Text = “Sub Total:”
    Label8.Text = “Discount:”
    Label7.Text = “Total:”
    End Sub
    [/vbnet]
  • Exit Button Code.
    [vbnet]
    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
    End
    End Sub
    [/vbnet]
  • Print Button Code
    [vbnet]
    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
    Dim g As Graphics = Me.CreateGraphics()
    Dim s As Size = Me.Size
    formImage = New Bitmap(s.Width, s.Height, g)
    Dim mg As Graphics = Graphics.FromImage(formImage)
    Dim dc1 As IntPtr = g.GetHdc
    Dim dc2 As IntPtr = mg.GetHdc
    Dim widthDiff As Integer = (Me.Width – Me.ClientRectangle.Width)
    Dim heightDiff As Integer = (Me.Height – Me.ClientRectangle.Height)
    Dim borderSize As Integer = widthDiff \ 2
    Dim heightTitleBar As Integer = heightDiff – borderSize
    BitBlt(dc2, 0, 0, Me.ClientRectangle.Width + widthDiff, Me.ClientRectangle.Height _
    + heightDiff, dc1, 0 – borderSize, 0 – heightTitleBar, 13369376)
    g.ReleaseHdc(dc1)
    mg.ReleaseHdc(dc2)
    pd.Print()End Sub
    [/vbnet]
  • Then, Add this Following Declarations.
    [vbnet]
    Private WithEvents pd As Printing.PrintDocument
    Dim formImage As Bitmap
    Private Declare Function BitBlt Lib “gdi32.dll” Alias “BitBlt” _
    (ByVal hdcDest As IntPtr, ByVal nXDest As Integer, _
    ByVal nYDest As Integer, ByVal nWidth As Integer, _
    ByVal nHeight As Integer, ByVal hdcSrc As IntPtr, ByVal nXSrc As Integer, _
    ByVal nYSrc As Integer, ByVal dwRop As System.Int32) As Long
    [/vbnet]
  • After that, Add This Following Sub.
    [vbnet]
    Private Sub pd_PrintPage(ByVal sender As Object, _
    ByVal e As System.Drawing.Printing.PrintPageEventArgs) Handles pd.PrintPage
    e.Graphics.DrawImage(formImage, 100, 100)
    End Sub
    [/vbnet]
  • Finally, Add the Following to the Form Load Event.
    [vbnet]
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    pd = New Printing.PrintDocument
    Me.StartPosition = FormStartPosition.CenterScreenEnd Sub[/vbnet]
  • Click F5 to run the Program.
    Output:

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