excel - 从关闭的工作簿中获取数据并分配给变量

Question

我正在使用下面的代码从已关闭的工作簿中检索一个数字。返回正确的MsgBox值，但我无法将该数字分配给我的modelVersion变量，也不明白为什么会这样。如果有人可以帮助我，我将不胜感激，因为我认为该ExecuteExcel4Macro方法可能不能以这种方式使用？

Public Sub checkModelVersion()
    
    Dim wbPath As String, wbName As String
    Dim wsName As String, cellRef As String
    Dim Ret As String

    wbPath = "C:\mypath\"

    wbName = "Update.xlsm"
    wsName = "Dashboard"
    cellRef = "E7"

    Ret = "'" & wbPath & "[" & wbName & "]" & wsName & "'!" & Range(cellRef).Address(True, True, -4150)

    MsgBox ExecuteExcel4Macro(Ret)
    modelVersion = ExecuteExcel4Macro(Ret)

End Sub