vb的一个小问题 - VC/MFC / 基础类

Private Sub Command1_Click()
mytext.Text = Str(taozi(1))
End Sub

Private Sub Form_load()
Dim begin As CommandButton
Dim mytext As TextBox
Set begin = Command1
Set mytext = Text1
mytext.Text = ""
begin.Caption = "确定"

End Sub
Public Function taozi(nihao As Integer) As Integer
taozi = nihao
For i = 1 To 7 Step 1
taozi = (taozi + 1) * 2
Next i
End Function


为什么mytext.text错了，如果原来窗体上没有command1和text1
而我想自己用set建立该如何写。我用set+new发现有错误!!

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