Exports the controls displayed within the LayoutControl to a file in MHT format.
NuGet Package: DevExpress.Win.Navigation
A String that specifies the full path to the file, to which the created document is exported.
This method indirectly calls the PrintingSystemBase.ExportToMht method of the XtraPrinting Library. If this library is not available the method does nothing. For details on the ExportToMht method see the PrintingSystemBase.ExportToMht topic.