Object reference not set to an instance of an object
大家好，向各位请下面这问题，希望能得到解达。非常感谢。
Structure ZIPnames
Public zFiles As String()
End Structure

Private zZipFileNames as ZIPName = new ZIPNames

Public Sub AddFile(ByRef FileName As Object)

zargc = zargc + 1
zZipFileNames.zFiles(zargc - 1) = FileName
End Sub

call AddFile(m_FileNameInDir) 报下述错误，Object reference not set to an instance of an object。

[解决办法]
错误是有对象指向错误，看看是不是有不能访问的对象