在VB中，怎样做才能使按钮单击一次，按钮名称显示为A，再单击显示B，如此在A,B间循环？请各位高手指点...

楼上搞错了好像，应该把事件写在Command的Click()事件里面
Private Sub Command1_Click()
If Command1.Caption = "A" Then
Command1.Caption = "B"
ElseIf Command1.Caption = "B" Then
Command1.Caption = "A"
Else
Command1.Caption = "A"
End If
End Sub

'放置一个按钮，把按钮的名称改为command1
Private Sub Command1_Click()
If Command1.Caption = "A" Then
Command1.Caption = "B"
Else
Command1.Caption = "A"
End if
end sub

在button1_click事件写：

if button1.caption="A" Then
button1.caption="B"
else
button1.caption="A"
end if

Private Sub Form_Load()
If Command1.Caption = "A" Then
Command1.Caption = "B"
ElseIf Command1.Caption = "B" Then
Command1.Caption = "A"
Else
Command1.Caption = "A"
End If
End Sub