String Array值无法通过函数

Question

当我将数组值作为字符串传递时，这两个函数都不起作用。

生成错误：编译错误：ByRef参数类型不匹配

 If SheetExists(StruArr(R, 2)) Then Sheets(StruArr(R, 2)).Delete

Public Function SheetExists(strSheetName As String, Optional wbWorkbook As Workbook) As Boolean
    If wbWorkbook Is Nothing Then Set wbWorkbook = ActiveWorkbook 'or ThisWorkbook - whichever appropriate
    Dim obj As Object
    On Error GoTo HandleError
    Set obj = wbWorkbook.Sheets(strSheetName)
    SheetExists = True
    Exit Function
HandleError:
    SheetExists = False
End Function

Function ChkWs(ws As String) As Boolean
    Dim ws As Worksheet
    Dim ret As Boolean
    ret = False
    wsName = UCase(wsName)
    For Each ws In ThisWorkbook.Sheets
        If UCase(ws.Name) = wsName Then
            ret = True
            Exit For
        End If
    Next
    ChkWs = ret
End Function

如果我使用直接文本，例如

     If SheetExists("abcd") Then Sheets("abcd").Delete

它会完美运作。