excel - Visual Basic Excel マクロ MessageBox.Show で「オブジェクトが必要です」というエラーがスローされる

Question

簡単に言えば、どんなに頑張っても、Excel マクロを介して MessageBox を表示できません。

ここに私がこれまでに持っている行があります:

MyBox = MessageBox.Show("Stuff", "Title")

このマクロを実行すると、次のエラーが発生します。

実行時エラー '424': オブジェクトが必要です

どうしたの！？！？

完全なコードは次のとおりです。

Sub ImportParser()
'
' ImportParser Macro
' By: Dennis Plotnik (July 2013)

'
    Dim ToKeepSize As Integer   ' Size of ToKeep array
    Dim BlankCount As Integer   ' Counts blank lines so as to stop execution after EOF
    Dim ReqText As String       ' Required String
    ReqText = "Import Control"
    BlankCount = 0
    ToKeepSize = -1
'    Dim ToKeep As String()
    Dim ToKeep() As String      ' Array to store names of tables that include required text
    Dim CurrentTable As String  ' String to store last required table name

    Range("B1").Select
    Do
        Do                      ' Go down until come to non-blank row (or exit if all blank)
            Selection.Offset(1, 0).Select
            Dim tempS As String
            tempS = "'" + ActiveCell.Formula
            ActiveCell.Value = tempS
            If ActiveCell.Value = "" Then
                BlankCount = BlankCount + 1
            Else
                Exit Do
            End If
        Loop Until BlankCount > 15
        If InStr(1, ActiveCell.Value, ReqText, vbTextCompare) > 0 Then  ' Check for ReqText in current cell
'            ActiveCell.Value = "HELLO!"                                ' For DEBUG purposes
            ToKeepSize = ToKeepSize + 1                                 ' Increment size of array (to allow for new value)
            ReDim Preserve ToKeep(ToKeepSize)
            Selection.Offset(0, -1).Select                              ' Move left to retrieve name of table (category)
            CurrentTable = ActiveCell.Value
            ToKeep(ToKeepSize) = CurrentTable
            For j = 0 To 10000
                Selection.Offset(1, 0).Select                           ' Cycle down until new table is reached
                Do
                    If ActiveCell.Value = "" Then
                        BlankCount = BlankCount + 1
                        Selection.Offset(1, 0).Select
                    Else
                        Exit Do
                    End If
                Loop Until BlankCount > 15

                If ActiveCell.Value <> CurrentTable Then
                    Selection.Offset(-1, 1).Select                      ' Return to Field Name to continue search for ReqText
                    Exit For
                End If
            Next j

        End If
    Loop Until BlankCount > 15

'    Range("F1").Select                                                 ' Print found tables [FOR DEBUG]
'    For i = 0 To ToKeepSize
'        ActiveCell.Value = ToKeep(i)
'        Selection.Offset(1, 0).Select
'    Next i
'    ActiveCell.Value = CStr(ToKeepSize)

    For i = 0 To 1                                  ' Prepare Table for Flag Columns
        Range("A1").EntireColumn.Insert
    Next i
    Range("A1").Select
    ActiveCell.Value = "Import Controlled?"
    Range("B1").Select
    ActiveCell.Value = "Delete it?"
    Columns("A:F").AutoFit

    BlankCount = 0
    Dim ImportControl As Boolean
    ImportControl = False
    Range("C1").Select
    Do                                              ' Flag necessary columns
        Selection.Offset(1, 0).Select
        If ActiveCell.Value = "" Then
                BlankCount = BlankCount + 1
        Else
            For i = 0 To ToKeepSize
                If ActiveCell.Value = ToKeep(i) Then
                    Selection.Offset(0, -2).Value = 1
                    Exit For
                End If
            Next i
        End If
    Loop Until BlankCount > 15

    Range("A1").Select                              ' Sort to push all required tables to top of file
    Columns("A:A").Select
    ActiveSheet.Sort.SortFields.Clear
    ActiveSheet.Sort.SortFields.Add Key:=Range("A1"), _
        SortOn:=xlSortOnValues, Order:=xlAscending, DataOption:=xlSortNormal
    With ActiveSheet.Sort
        .SetRange Range("A:F")
        .Header = xlGuess
        .MatchCase = False
        .Orientation = xlTopToBottom
        .SortMethod = xlPinYin
        .Apply
    End With
    Range("A1").Select

    Do
        Selection.Offset(1, 0).Select
    Loop Until ActiveCell.Value = ""

    MyBox = MessageBox.Show("Stuff", "Title")

    Dim file As String
    file = Application.ActiveWorkbook.Path

    Dim Word As Object: Set Word = CreateObject("Word.Application")

    Word.Visible = True

    Set docWD = Word.Documents.Add


    docWD.SaveAs file & "\" & "dictionary", FileFormat:=wdFormatDocument
    Range(ActiveCell.Offset(0, 2), "F1").Copy
    Word.Selection.Paste

End Sub