Fw: Using C, C++, Lisp together

Sorry to bother you, but I was hoping you could help me find the anwers to a few quesitons. My first queston: I would like to popup-menu at the current cursor location(point). How do I do that? Right now it popups at the mouse location in X, and In windows the top left corner of the screen. Other questions... I have some c++ code that I'm using in my feature, I need the info it gets to be put into the menu I created at the cursor location. So I'm not sure if I'll be calling C from lisp, or lisp from C. I thought maybe I could write a C callable code in C++, which will call the C++ function(s). A lisp primitive that would call the C code (the wrapper for the C++ code), the load lisp menu with the names I need in it. Is there and eaiser way? Will this work? //.c file DEFUN("generate-menu", Fgenerate_menu, 1, UNEVALLED, 1, /* Calls a C function parse_menu_wrapper to get the cliffpletions and placed them in the cliffpletion menu */ (name)) { return parse_menu_wrapper(name); } //not sure what return types I will need, it takes a string and will return 1 or more strings something like .cpp extern "C" something parse_menu_wrapper(const* str) { return parse_menu(str); //C++ functions } //C++ something parse_menu(string str) { //read the string //read the parse.dat file and find the string //write the parse_menu.dat file //data for the menu } Should I be passing some type of stream, I think emacs lisp uses a lstream, but not sure how it is used. Summary: C++ data stuctures have the names(strings) of what I need, they need to be passed to the menus I created at cursor position when needed.