practical no:3.
code:
Public Class Form1
    Private Sub Button1_Click(sender As
Object, e As EventArgs) Handles
Button1.Click
        Dim a, b, c As New Integer
        a = InputBox("Enter 1st no")
        b = InputBox("Enter 2nd no")
        c = a + b
        MsgBox("Sum=" & " " & c)
    End Sub
    Private Sub Button2_Click(sender As
Object, e As EventArgs) Handles
Button2.Click
        Dim a, b, c As New Integer
        a = InputBox("Enter 1st no")
        b = InputBox("Enter 2nd no")
        c = a - b
        MsgBox("Sub=" & " " & c)
    End Sub
    Private Sub Button3_Click(sender As
Object, e As EventArgs) Handles
Button3.Click
       Dim a, b, c As New Integer
        a = InputBox("Enter 1st no")
        b = InputBox("Enter 2nd no")
        c = a * b
        MsgBox("mul=" & " " & c)
    End Sub
    Private Sub Button4_Click(sender As
Object, e As EventArgs) Handles
Button4.Click
       Dim a, b, c As New Integer
       a = InputBox("Enter 1st no")
       b = InputBox("Enter 2nd no")
       c = a / b
       MsgBox("div=" & " " & c)
    End Sub
End Class
output: