How to convert this C type to a c# type

Question

I have a type CK_NOTIFY in C++ defined as follows:

typedef uint ( * CK_NOTIFY)(
   uint   hSession,
   uint   event,
   void*  pApplication
);

I need to redefine this type in C# because I need to use it as an argument for a pinvoke function. What is it exactly? A structure? Or a function pointer?

Answer 1

It would be a delegate . Your "C type" is describing a function.

The function returns a uint and takes 2 uints and a void* .

So your delegate could look like:

Func<uint, uint, object, uint>

How you want to handle the void* is up to you...

Answer 2

如果需要进行互操作（即，将其传递到非托管DLL），则需要这样的委托声明：

public delegate uint CK_NOTIFY(uint hSession, uint @event, System.IntPtr pApplication);