#define SPLFILE_CONTENT_TYPE_PROP_NAME L"Spool File Contents"
The following are the valid string values for this property.
Unknown PDL format.
Print servers are not required to support this property. Print clients are not required to support or set this property. If a print client does not set this property on a print job that the client submits to a print server, but the print server supports this property, the print server SHOULD by default select the value L"TYPE_XPS_MS".