Here is an ATL project for viewing all "classes" from a dll, tlb, or ocx, in fact library files. User can read some of informations, like functions(methods and properties) from a file, only if that file has a resource "TYPELIB"\1 in resource component. I use the LoadTypeLib file to provide a pointer to a ITypeLib interface. From the ITypeLib interface you can find all that library know (functions, variables, names, ...).
Classes and Interfaces uses in project
ILib2Me (CLib2Me) - an interface which provides two functions: Load and Class Load function loads the file as TypeLibrary. If the is function successfull, then you can call funtion Class to provide one by one all interfaces, enums, coclass, ... defines in library. Function will return a pointer to an ILClass interface.
ILClass (CLClass) - This interface provides informations about one "class". I define "class" to be a : enum, record, module, interface, dispatch, coclass, alias, union or max .(kinds) User can find the name (get_Name ), kind (get_Kind), count of functions, function (get_Function), count of variables, variable (get_Variable) of this "class". get_Function(int nIndex) function returns pointer (ILFucntion*) to the function nIndex from class. get_Variable(int nIndex) function returns pointer (ILVariable*) to the variable nIndex from class. In both cases, functions will return NULL, if nIndex is not found in range (0..GetCount...() - 1).
ILFunction(CLFunction) - This interface provides infromations about one function. User can find name (get_Name), kind (get_Kind - virtual,purevirtual,nonvirtual,static,dispatch), invoke kind (get_InvokeKind - function(1), get(2), put(4),putref(8)), documentation (get_Documentation), ID (get_ID), parameters and return type. If you want one of the function's parameter, wou have to call get_Parameter function. You have to pass the index of parameter, and this parameter will return the pointer to one parameter interface (ILParameter*).
ILVariable(CLVariable) - This interface provides informations, like name, type and kind (persistance, static, const or dispatch) of one variable.
ILParameter(CLParameter) - This interface wil return informations such name (get_Name, and type (get_Type), of one parameter.
DEMO program And Source(Updated)
Now one can even watch interfaces of a particular object. Demo application in VC++ included.
This is how DEMO VB program looks like :-
A new DEMO program has been added in VC++
The demo project VB requires XPropertiesWnd ActiveX control. See A set of two activeX controls article.