PROGRAM TO CREATE A USER DEFINED FUNCTION AND INVOKE IT

DEFAULT.ASPX FILE:
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Button ID="Button1" runat="server" Text="Click for function" Width="132px" />
        <br />
        <br />
        <br />
        <asp:Label ID="Label1" runat="server" Width="132px"></asp:Label></div>
    </form>
</body>
</html>

DEFAULT.ASPX.VB FILE:

Partial Class _Default
    Inherits System.Web.UI.Page

    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        Label1.Text = GetString()
    End Sub
    Function GetString() As String
        Return "I'm from the function"
    End Function
End Class

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