Excel VBA封装为Dll的例子、方法与总结【逐步完善中...】

看看下面常用的VBA界面处理代码，封装为Dll时应该如何改代码？

'需要封装的VBA代码
Sub 恢复系统界面()
    On Error Resume Next
    With Application
        .Caption = "版权所有:GoodFortune From www.ExcelHome.net"
        .CommandBars("Worksheet Menu Bar").Enabled = True
        .CommandBars("Toolbar List").Enabled = True
        .CommandBars("Standard").Visible = True
        .CommandBars("Formatting").Visible = True
        .DisplayFormulaBar = True
    End With
    With ActiveWindow
        .DisplayGridlines = True
        .DisplayHeadings = True
        .DisplayHorizontalScrollBar = True
        .DisplayVerticalScrollBar = True
        .DisplayWorkbookTabs = True
    End With
End Sub
Sub 隐藏系统界面()
    On Error Resume Next
    With Application
        .CommandBars("Worksheet Menu Bar").Enabled = False
        .CommandBars("Toolbar List").Enabled = False
        .CommandBars("Standard").Visible = False
        .CommandBars("Formatting").Visible = False
        .DisplayFormulaBar = False
    End With
    With ActiveWindow
        .DisplayGridlines = True
        .DisplayHeadings = False
        .DisplayHorizontalScrollBar = False
        .DisplayVerticalScrollBar = False
        .DisplayWorkbookTabs = False
    End With
End Sub

首先，分析一下，上面的VBA代码中有几个需要传递的变量（或者先分析“对象”），一个是Application，一个是ActiveWindow，其中ActiveWindow是Application的下一级对象，因此，按第2条原则，从最上一层开始，完整形式为Application.ActiveWindow，因此上面的代码可以改成如下的形式，用一个变量传递就可以了。

'封装为Dll的代码
Sub 恢复系统界面(oExcel as Excel.Application)
    On Error Resume Next
    With oExcel
        .Caption = "版权所有:GoodFortune From www.ExcelHome.net"
        .CommandBars("Worksheet Menu Bar").Enabled = True
        .CommandBars("Toolbar List").Enabled = True
        .CommandBars("Standard").Visible = True
        .CommandBars("Formatting").Visible = True
        .DisplayFormulaBar = True
    End With
    With oExcel.ActiveWindow
        .DisplayGridlines = True
        .DisplayHeadings = True
        .DisplayHorizontalScrollBar = True
        .DisplayVerticalScrollBar = True
        .DisplayWorkbookTabs = True
    End With
End Sub
Sub 隐藏系统界面(oExcel as Excel.Application)
    On Error Resume Next
    With oExcel
        .CommandBars("Worksheet Menu Bar").Enabled = False
        .CommandBars("Toolbar List").Enabled = False
        .CommandBars("Standard").Visible = False
        .CommandBars("Formatting").Visible = False
        .DisplayFormulaBar = False
    End With
    With oExcel.ActiveWindow
        .DisplayGridlines = True
        .DisplayHeadings = False
        .DisplayHorizontalScrollBar = False
        .DisplayVerticalScrollBar = False
        .DisplayWorkbookTabs = False
    End With
End Sub

由上可见，封装中需要修改的是将对象变量换成从根一级开始的完整形式，其他部分则不需要修改。

上面的例子是我学习中的经验总结，拿出来分享，虽然写的不好，但却是自己一步一步琢磨的，希望能抛砖引玉，请朋友们多指点。