Hi Rolf, Your questions are off topic for this forum. > Does someone know of good coding rules for template classes, other than "put all in the .h file"? Look here... http://www.parashift.com/c++-faq-lite/templates.html > If a template declaration is separated from the definition as to deliver declaration only to the user how will the definition get compiled to code? It won't. The declaration+definition of a template is different from the instantiation of a template. It would be like saying "I want to have 'inline int DoSomething(int, int);' declaration in the header for delivery to the user, but the definition elsewhere where the user can't see it. How will the definition get compiled (instantiated) to the user's code?" > Do I need a third "instantiation" file? Is there some literature about this around? There is something like this, but it doesn't do what you want. And it isn't supported very well by C++ compiler vendors in general, so tends to be used infrequently. For GCC, look here... http://gcc.gnu.org/onlinedocs/gcc/Template-Instantiation.html HTH, --Eljay
