OpenEuphoria

Need help w/ call_back

• Posted by Brian Broker <bkb at cnw.com> Jan 28, 2002
• 448 views

So I'm working with a dll and I'm trying to wrap a function that 
requires a call_back() pointer.  No problem here... when I trace my test 
program, I see that my callback function is being called and the 
parameters being passed to it look OK but I'm getting an access 
violation (C0000005) when I return from the function.  When I try a 
debug version of the dll, I can get through several iterations of my 
callback function before I start getting bad parameters and a crash.

The dll shouldn't care what I return from the callback because it's a 
void function (it's actually a callback procedure...) Also, if I define 
my callback function with no input parameters, I don't get a crash (but 
this doesn't help me because I need the input parameters to do anything 
useful).

Does anybody have any further suggestions to help me figure out what 
might be the problem?  I've checked and double checked the obvious 
(declarations, etc.) and working with callback functions is not new to 
me.  It's just that this particular one has got me stumped.

Thanks,
-- Brian