Global variables

Global variables
الالة الحاسبة باستخدام المتغيرات الشاملة

Public Class Form1
Dim a, b, add, subtract, mult, div As Decimal

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
a = Decimal.Parse(Me.TextBox1.Text)
b = Decimal.Parse(Me.TextBox2.Text)
add = a + b
Me.Label3.Text = add.ToString()
End Sub
Private Sub Button6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button6.Click
End
End Sub
Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
TextBox1.Text = ""
TextBox2.Text = ""
Label3.Text = ""
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
subtract = a - b
Me.Label3.Text = subtract.ToString()
End Sub

Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
mult = a * b
Me.Label3.Text = mult.ToString()
End Sub

Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
div = a / b
Me.Label3.Text = div.ToString()
End Sub