Albrecht Schlosser wrote:

> Add the following three lines with "***" comments to your code, and it 
> will work as intended.
> 
>   bool response = false;
>   responseWindow->user_data((void*)&response);
> 
>   Fl_Window *g = Fl::grab();    // *** non-NULL, if menu is open
>   if (g) Fl::grab(0);        // *** release menu grab()
> 
>   // Here's where it hangs
>   while (responseWindow->shown())
>     Fl::wait();
> 
>   if (g) Fl::grab(g);        // *** restore menu grab()

Sorry, I must add this *WARNING*:

Please use this as a workaround for FLTK 1.1.9 only and test again after later 
upgrading. After all I'm not sure if we will find a completely different 
solution for FLTK 1.1.10 and FLTK 1.3 - I'm thinking of something, but I need 
some more investigation time. But _if_ we do, then this proposed solution 
_might_ crash your program or have bad effects, because the last line _might_ 
use a pointer to a (menu) window that has been deleted during the Fl::wait() 
loop. I'm sorry that this is so vague, but I really don't know more now.

Albrecht