error C2065: 'PpFixedFormatType' : undeclared identifier

Question

m_Pre.ExportAsFixedFormat(path, 
                    PpFixedFormatType.ppFixedFormatTypeXPS, 
                    PpFixedFormatIntent.ppFixedFormatIntentPrint, 
                    Microsoft.Office.Core.MsoTriState.msoTrue,  
                    PpPrintHandoutOrder.ppPrintHandoutHorizontalFirst, 
                    PpPrintOutputType.ppPrintOutputSlides, 
                    Microsoft.Office.Core.MsoTriState.msoTrue, 
                    null, 
                    PpPrintRangeType.ppPrintAll, 
                    null, 
                    true,  
                    true,  
                    true,  
                    false,  
                    false,  
                    null  
);

How can you use these parameters?