I have created COM server in C++ that is used from C# application. Now I have to add one more method to my COM object and one of its parameter must be function pointer to callback function. C++ original function looks like this:
typedef int (__stdcall *tCallBackFunc)(int Param);
void MyFunc(void* CallBackFunc)
{
int Param;
//some code
((tCallBackFunc)(CallBackFunc))(Param); //call callback function
}
I need to add MyFunc as COM object method. VS VC++ "Add Method" dialog offers some predefined types for COM method parameter like "int*" or "bstr", I tried to define "CallBackFunc" parameter as "int*" type, but I was not able to make it work in C#:
public delegate int tCallBackFunc(int Param);
...
tCallBackFunc cb; //I will initialize it when it is compiled
MyCOMObject.MyFunc(cb); //cannot find any way to cast cb to "ref int"
It seems I use wrong approach, is there a fast way to declare function pointer as parameter of COM object method in C++ and then use it in C#?
