callback in a class, what do I do?

I have a window callback in a class, and I want to access another varible in that class from the callback, but when I put the name of the varible down in there, it doesn't recognize it. So how do you access another member of a class from a callback member?

Your callback function is static, isn't it? In that case you can only access static members.

Pass a pointer to the object to the static callback, then cast that to the object and call a member function from it.

But it's a callback, I only need to access other members when all the arguments are taken.

So, if I get it right, you are saying that the callback has no "spare" or "user defined" parameters that you could use to pass for example a pointer to your object?

Can you perhaps tie the object to some parameter that is known (and unique) in the callback - for example, if you have a "HWND" that is a handle to your particular window, you could use that in to find your object back again, by having a structure like this:

Code:

---

struct hwnd_to_object
{
    HWND hwnd;
    CObject *pObject;
} hwnd_list[10];

...
  i = find_next_free(hwnd_list);
  hwnd_list[i].hwnd = hwnd;
  hwnd_list[i].pObject = myObject;
...

---

I'm not saying you have to use the HWND, but anything that is unique that is known at bot ends of the call is what you need.

--
Mats

Hmm, good idea. Thanks.