C++ Functions as parameters

Question

I have a DLL containing C++ code, which works perfectly in Visual C#. When I create a fucton in the C++ DLL, it shows up in Visual C# and I call it, even with parameters. However, when I add a function pointer as one of the parameters in the C++ DLL, it cannot be found by Visual C#.

C++ Functions:

 int TEST(int *func) // Works fine and shows up in visual C#.
 { 
     return 0;
 } 

int TEST2(int (*func)()) // Works, however doesn't show up in Visual C#
{
     return 0;
}

UPDATE:

When I call TEST2 from C#, I get the error: 'TEST2' is not supported by the language

Answer 1

函数指针参数应该像这样声明：

int TEST2(int (*func)()) { /*...*/ }

Answer 2

我很确定你需要围绕*func括号来告诉编译器* func是一个指向函数int (*func)()的指针，而不是你所拥有的int *(*func)() 。