How to use Tooltip, Error Provider and Notify Icon in Microsoft Visual Basic.Net

First of all I am going to give you a brief introduction about Tooltip, Error Provider and Notify Icon in Microsoft Visual Basic.Net.
Tool Tip: - are windows which display some explanatory text when a user hovers mouse over a control.

Notify Icon: - It lets you display an icon in the task bar. To use notify icon you need to set the icon property of the notify icon to set an icon.

Error provider: - it allows you to set an error message for any control if the input is not valid.

First open a new Project in VB.Net and place 1 Text Box, 2 Buttons, Tool tip, Error Provider and Notify Icon on the form.I have changed the name of the buttons to btnerror and btnNotify and also you need to set an icon for the notify icon.
Now open the code windows and type the following code.

Private Sub TextBox1_MouseHover(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBox1.MouseHover
        ToolTip1.SetToolTip(TextBox1, "Pls enter name here")
    End Sub

    Private Sub NotifyIcon1_MouseDoubleClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles NotifyIcon1.MouseDoubleClick
        MsgBox("You have douuble clicked the button")
    End Sub

    Private Sub btnNotify_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnNotify.Click
        NotifyIcon1.Visible = True
    End Sub

    Private Sub btnerror_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnerror.Click
        Dim name As String
        name = TextBox1.Text

        If name <> "Sarfaraz" Then
            ErrorProvider1.SetError(TextBox1, "Please check your name")
        Else
            ErrorProvider1.SetError(TextBox1, "")
            Exit Sub

        End If

    End Sub