When an inline function is marked __declspec(dllimport), the function definition in this compilation unit might be inlined, but is never generated out-of-line. An out-of-line call or address reference uses the imported symbol.

You can only use __declspec(dllimport) on extern functions and variables, and on classes.

When a class is marked __declspec(dllimport), its static data members and member functions are all imported. When individual static data members and member functions are marked with __declspec(dllimport), only those members are imported.

If you mark a class with __declspec(dllimport), you cannot then mark individual members of that class with __declspec(dllimport).

__declspec(dllimport) int i;
class __declspec(dllimport) X {   void f(); };