关闭窗体！急！

[dandy1437]

我在MDI主窗体上面装了一个按钮，用来关闭打开的当前CHILD窗体
但是如果我关闭了所有的窗体以后，再按按钮就报错，程序如下
Dim N As Form
Set N = Me.ActiveForm

Unload N
我想来判断当前的CHILD窗体个数，如果为0，我就灰掉按钮
我该怎么判断阿？

[lhxtx]

把代码都copy 出来看看

[逍遥鹰王]

Dim N As Form

Dim i As Integer
For Each Form In Forms
i = i + 1
Next
If i > 1 Then
Set N = Me.ActiveForm
Unload N
End If

[sddxsyf]

Do While True
On Error GoTo ee1
Unload MDIForm1.ActiveForm
Loop
ee1:
Command1.Enabled = False

[dandy1437]

帮忙阿！