IO_Menu and IO_Checklist

I know that some teams including us had some troubles with IO_Menu and O_Checklist. Two functions(getOwnerTop() and getOwnerLeft()) from this classes gave compile error because they never were created in other classes. We spend some time trying to figure out where to create that, then we gave up and asked Fardad.
These functions are a part of IO_Field class, they should return _owner->left and _owner->top()
I hope it helps...