[ROOT] loading a shared library but not being able to use the classes in it

From: Armin Reichold (a.reichold1@physics.ox.ac.uk)
Date: Thu Jun 14 2001 - 19:36:41 MEST


Dear Rooter and Valerie
I am using ROOT 3.01.05 on windows 2000.
I have a set of classes I would like to use in root
I generate a dictionary for them like this:

rootcint -f MyDictionary.cxx MyClass1.h ..... MyClassN.h linkdef.h

During dictionary generation I get some warnings about Datamembers being
pointers to fundamental types and thus cint does not know their size but
since I don't need the streamers for the classes I don't really care I
think.

my linkdef.h looks like this:
====================================
#ifdef __CINT__

#pragma ling off all globals;
#pragma ling off all classes;
#pragma ling off all functions;

#pragma link C++ class MyClass1;
.....
#pragma link C++ class MyClassN;

#endif
====================================

I have compiled the classes into a dll (developer studio 6) wich I load into
an interactive root session with .L mylibrary.dll
I then try to use them and root complains that it does not know them like:
class, stuct, union or type MyClass1 not defined
Same error occurs if I try: .class MyClass1

However if I load the dll again it says:
warning in <Add>: class MyClass1 allready in in TClassTable

Note:
starting root I do get a funny message which says:
Warning in <TWinNTSystem::setProgname>: wrong Program Path
maybe that has something to do with my problems

Valerie:
this seems to be related to one of your latest messages to roottalk about
loading dll's under windows but I am not realy sure.


thansk for any help,
cheers Armin

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