'In my toolbar i created a property mode and an event change_entry_mode
'and on every button click i changed the property and raised the event

Public Class UserControl1
    Public Event change_entry_mode()
    Private entry_mode As String = ""
    Public Property mode() As String
        Get
            Return entry_mode
        End Get
        Set(ByVal value As String)
            entry_mode = value
        End Set
    End Property
    Public Sub New()

        ' This call is required by the Windows Form Designer.
        InitializeComponent()

        ' Add any initialization after the InitializeComponent() call.

    End Sub

    Private Sub Add_Button_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Add_Button.Click
        entry_mode = "ADD"
        RaiseEvent change_entry_mode()
    End Sub

    Private Sub Edit_Button_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Edit_Button.Click
        entry_mode = "MOD"
        RaiseEvent change_entry_mode()
    End Sub


    Private Sub Delete_Button_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Delete_Button.Click
        entry_mode = "DEL"
        RaiseEvent change_entry_mode()
    End Sub
End Class

'This is my form where this usercontrol i.e. toolbar placed
'I just created a sub which handles change_entry_mode

Public Class Instr

    Private Sub maintoolbarclick() Handles UserControl11.change_entry_mode
        Select Case Me.UserControl11.mode
            Case "ADD"
                MsgBox("Add Button Clicked")
                Me.UserControl11.mode = ""
            Case "MOD"
                MsgBox("Edit Button Clicked")
                Me.UserControl11.mode = ""

        End Select
    End Sub
End Class