VB快帮忙_vb中获取帮助的快捷键是什么

'当程序运行时，单击"窗体背景色修改"按钮，可使窗口背景色改变为红色，再单击时变为绿色，再单击时变为蓝色，然后又转为红色，循环改变,单击“退出”按钮时，可退出应用程序。

'方法1:用SELECT CASE

Option Explicit
Dim i As Integer

Private Sub Command1_Click()
i = i + 1
Select Case i
Case 1
Me.BackColor = RGB(255, 0, 0)
Case 2
Me.BackColor = RGB(0, 0, 255)
Case 3
Me.BackColor = RGB(0, 255, 0)
i = 0
End Select
End Sub

Private Sub Command2_Click()
Unload Me
End
End Sub

Private Sub Form_Load()
Me.Caption = "窗体背景色修改"
Command1.Caption = "窗体背景色修改"
Command2.Caption = "退出"

End Sub

'方法2: IF...THEN
Option Explicit
Dim i As Integer
Private Sub Command1_Click()
i = i + 1
If i = 1 Then
Me.BackColor = vbRed ' RGB(255, 0, 0)
ElseIf i = 2 Then
Me.BackColor = vbGreen ' RGB(0, 0, 255)
ElseIf i = 3 Then
Me.BackColor = vbBlue ' RGB(0, 255, 0)
i = 0
End If
End Sub

Private Sub Command2_Click()
Unload Me
End
End Sub

Private Sub Form_Load()
Me.Caption = "窗体背景色修改"
Command1.Caption = "窗体背景色修改"
Command2.Caption = "退出"

End Sub