concurrency problem with pointers

[evilrat]

i hate asking for help, but... now i'm pushed in the corner. so 
here is my problem:
i have struct with handle, and i need to send this struct or 
handle to second thread, all fine but feeding this struct or 
handle to send results in multiple errors(mostly complains about 
thread local data). and unfortunatelly shared and __gshared 
doesn't helps(complains about unknown size of handle).

well, i wish i could describe in details without code but... here 
is simplified example
--------

void main() {
   MyData data;
   // load data
   ...

   MyWindow wnd(data);
   wnd.show();
   auto tid = spawn(&newViewThread);
   send(tid, wnd);
}

// struct because i want benefit from RAII, but if necessary 
could switch to class
struct MyWindow {
   this ( MyData data ) { ... }
   // WINDOW defined as struct but has no size
   WINDOW* handle;
}

// 3rd party func to get window
WINDOW* createWindow(...);

----------
shortly speaking, WINDOW is pointer to window in C library so 
it's "shared", and i need it in another thread to make opengl 
context current in that thread, but compiler simply doesn't allow 
me to do anything with that, and i can't change definition since 
it's 3rd party bindings. any suggestions?