IupSetFunction
Associates a function to an action.
This function is now deprecated. The applications should use IupSetCallback instead.
Parameters/Return
Icallback IupSetFunction(const char *name, Icallback func); [in C] [There is no equivalent in Lua]
name: name of an action.
func: address of a C function. If NULL removes the association.
Returns the address of the previous function associated to the action.