typedefs and prototypes

[Michael Zehr]

I'm writing a graphics interface library which ends up passing a lot
of pointers to functions.  I've run into a problem with
typedefs and prototypes:


/* typedef and prototype declaration of a widget */

typedef void (*Keyboard_widget)(int key, void *data);

Keyboard_widget kb_widget1;


/* definition of a widget */

void kb_widget1(int c, void *data)
{...}


I get a "conflicts with previous declaration" at that point.  If I try
to define the widget by the typedef, what syntax do i use???

Keyboard_widget kb_widget1  /* where do the formal parameters go??? */
{...}

Anyone have any suggestions?
(The reason why i want to use the typedef is that i have to pass
objects of type Keyboard_widget into some functions, and store them in
structures.  i can use a "normal" prototype for the function but is it
strictly conforming when i later on pass a pointer to that function to
a procedure that's expecting a Keyboard_widget???)

-michael j zehr