Vb.Net Calculator Ver. 1.0

Submitted by velmaxtechnologies on Monday, July 25, 2016 - 08:56.

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Hello, this source code demonstrates how to create a basic calculator using Visual Basic.Net This Calculator application can perform two tasks i.e Addition and Subtraction of whole numbers. Global Variables

  Dim operater_on As Boolean = False
  Dim operater As String = ""
  Dim val1, val2 As Double

Form Load Event

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
   AddHandler btn0.Click, AddressOf buttonClick
   AddHandler btn1.Click, AddressOf buttonClick
   AddHandler btn2.Click, AddressOf buttonClick
   AddHandler btn3.Click, AddressOf buttonClick
   AddHandler btn4.Click, AddressOf buttonClick
   AddHandler btn5.Click, AddressOf buttonClick
   AddHandler btn6.Click, AddressOf buttonClick
   AddHandler btn7.Click, AddressOf buttonClick
   AddHandler btn8.Click, AddressOf buttonClick
   AddHandler btn9.Click, AddressOf buttonClick
End Sub

Number buttons click handler

Private Sub buttonClick(sender As Object, e As EventArgs)
 
    Dim btn As Button = DirectCast(sender, System.Windows.Forms.Button)
    If lblDisplay.Text = "0" Or operater_on = True Then
       lblDisplay.Text = btn.Text
       operater_on = False
    Else
       lblDisplay.Text = lblDisplay.Text & btn.Text
    End If
  End Sub

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