To use the API functions, your source code must include a declaration file for c?ll29.dll (C++: cmbtll29.h), which needs to be done after the "#include <windows.h>" statement resp. the precompiled header file, as Windows data types are used in the declarations. Additionally, you need to link the corresponding LIB file (C++: c?ll29.lib). In order to use the API for managing preview files (see chapter Managing Preview Files) you need to include the declaration file for c?ls29.dll (C++: cmbtls29.h) and if neccessary link to the corresponding LIB file (C++: c?ls29.lib).
Dynamic loading of the DLLs is also possible – you will find a description in the article "HOWTO: Loading the List & Label DLLs Dynamically in C/C++ and Delphi" in our knowledgebase.
Note: The ? in the above file names should be replaced with either "m" (32-bit) or "x" (64-bit).