E2561 Can't explicitly export member in a class already marked for export (C++)
Go Up to Compiler Errors And Warnings (C++) Index
The user marked a member function with __declspec(dllexport) inside a class that was also marked __declspec(dllexport).
Example:
class __declspec(dllexport) C
{
void __declspec(dllexport) f();
};