Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Form2.Show()
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Me.BackColor = Color.Red
Form2.BackColor = Color.BlueViolet
End Sub
窗体属性设置里就有啊
窗体的backcolor