The flag of compilation /clr:old_syntax does not support the use of specific .NET keywords (as #using).
Therefore, using /clr would be a workaround but is incompatible with flag /rtc1.

So I need a way to call managed code in a dll B from native code in a dll A.
To do so, no C++ managed extensions (C++/CLI) must be in dll A. Otherwise, it would need to be compiled with the flag /clr.

Solution is to put a native exported function (_declspec(export)) in dll B which returns an interface to my managed class. Then in my native dll A, I would simply include the header file to the exported function from managed dll B and call it to retrieve an interface which maps to the concrete managed class in dll B.

Hope this helps someone, if not feel free to ask questions.

How to send raw data to a printer by using Visual C# .NET

Setting pDataType = "RAW" seems to have nothing to do with PCL exclusivly. The data that is later on sent can be PostScript, ESP, etc.

http://support.microsoft.com/kb/322091/en-us

Other samples :

http://www.codeproject.com/KB/printing/pclprinting.aspx
http://www.codeproject.com/KB/vb/Print_Raw_Data.aspx

Printer Escape Functions

http://msdn.microsoft.com/en-us/library/dd162843(VS.85).aspx

Linq-to-Entities = ObjectContext
Linq-to-Sql = DataContext
Why?