## SaveOptions.ProgressCallback property Called during saving a document and accepts data about saving progress. ```csharp public IDocumentSavingCallb ProgressCallback { get; set; } ``` ## Remarks ......to Docx, FlatOpc, Docm, Dotm, Dotx, Doc, Dot, Html, Mhtml, Epub...supported: Docx, FlatOpc, Docm, Dotm, Dotx. OoxmlSaveOptions saveOptions...