Okay, probably more of a generic c topic but am writing the program in c++.
What I am wanting to know is how would I go about writing a callback function.
The term 'callback function' I am using to describe the process through which function A has the name of function B passed to it and will then call function B.
As I am going to be passing it the name of a function that resides within a c++ class, are there any particular circumstances that need to be adhered to?
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ggCode:#include <iostream> using namespace std; int foo(long l) { cout << "foo(" << l << ")" << endl; return 0; }//foo int bar(long l) { cout << "bar(" << l << ")" << endl; return 1; }//bar // create a typename for a pointer to a function // that returns int takes one long parameter typedef int (*foobar_ptr_t)(long); int main() { foobar_ptr_t fp1, fp2; fp1 = foo; // address-of operator (&) is ok too fp2 = &bar; fp1(1); fp2(2); return 0; }//main
You may have to make the member function static. I believe it is not possible to pass a non-static member function pointer to a callback function. On the topic of function pointers, here is a good site.
You probably don't want to pass a string for the function, to be used with GetProcAddress32(). Function pointers are much better suited for this purpose.
What does the program actually do?
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You can apply the above code using class methods as long as they are declared static.
If you want the use "pointer to non-static member function" semantics, then read this.
gg
