Public Class Form1 Private Sub Button1_Click(sender ~) Handles Button1.Click Dim f As New Form2 f.Show() End Sub Public Class Form2 '2つのBackGroudWorkerはDesignerで定義 Private Sub Form2_Load(sender ~) Handles MyBase.Load bg.RunWorkAsync() End Sub Private Sub bg_DoWork(sender ~) handles bg.DoWork ~ End Sub Private Sub bg_RunWorkerCompleted(~) handles bg.RunWorkCompleted ~ bg2.RunWorkAsync() End Sub Private Sub bg2_DoWork(sender ~) handles bg2.DoWork ~ End Sub Private Sub bg2_RunWorkerCompleted(~) handles bg2.RunWorkCompleted Me.Close End Sub