Visual Basic.NET - formulario splash

Poner una formulario splash ...

queria saber como cargar una imagen duranete 5 segundos y despues pasar al furmulario principal

Es sencillo

En tu frmSplash debes agregar un timer

'enabled=true
'interval=500

Dim init As DateTime
Dim stp As DateTime

Private Sub FrmSplash_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
init = Date.Now
End Sub

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
stp = Date.Now
If stp.Subtract(init).Seconds = 5 Then
Me.Close()
End If
End Sub

En tu aplicacion principal en elevento load

Private Sub MDIParent1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
FrmSplash.ShowDialog()
End Sub