我遇到了下面给出的代码
Object oMissing = System.Reflection.Missing.Value
oDataDoc = wrdApp.Documents.Open(ref oName, ref oMissing,
ref oMissing, ref oMissing, ref oMissing, ref oMissing,
ref oMissing, ref oMissing, ref oMissing, ref oMissing,
ref oMissing, ref oMissing, ref oMissing, ref oMissing,
ref oMissing);
我不明白 ref oMissing 会做什么。它会自动获取值或类似的东西吗?