Public Class Form1

    Public Shared Sub Main()
        Dim spFrm As SplashForm = New SplashForm()
        spFrm.Show()
        spFrm.Refresh()

        Dim frm1 As Form1 = New Form1(spFrm)
        Application.Run(frm1)
    End Sub

    Private splash As Form

    Private Sub MenuItem1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MenuItem1.Click
        Me.Close()
    End Sub

    Public Sub New(ByVal splashScreen As Form)

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

        ' Add any initialization after the InitializeComponent() call.
        splash = splashScreen

        ' Simulate a long-running construction
        System.Threading.Thread.Sleep(5000)

    End Sub

    Private Sub Form1_Paint(ByVal sender As System.Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
        If Not splash Is Nothing Then
            ' Close the splashscreen
            splash.Close()
            splash.Dispose()
            splash = Nothing
        End If
    End Sub
End Class