Re: Changing a struct passed to a DLL without breaking everything?

Hi,

I know it might be a long shot, but hopefully someone has a 'neat'
solution to my problem.

We have an exe that calls a function in a loaded DLL

// this is the function called on all the DLLs
void MyFunction( MY_OWN_STRUCTURE& sMyOwnStructure );

// the structure itself is defined
struct MY_OWN_STRUCTURE
{
  size_t numOfItems;
  int miscValues[ 255 ];
};

// I want to change the structure to be more dynamic, something like
struct MY_OWN_STRUCTURE
{
  size_t numOfItems;
  int* miscValues;

  // ... copy ~tor and so on...
};

Now, obviously the structure is totally different from the previous one,
but I can easily convert from the new one to the old one.

I do not want to change/recompile any of the older Dlls.

But, how can I safely pass the new structure to the old DLL?

How can I tell what structure will be used by the DLL?