OpenEuphoria

Re: An old C function problem revisited

• Posted by Jason Gade <jaygade at yahoo.com> Feb 24, 2006
• 504 views

Jason Gade wrote:
> 
> Jonas Temple wrote:
> > 
> > Al Getz wrote:
> > > Hi there,
> > > 
> > > 
> > > Which line in the code does :3631 refer to... is it:
> > > 
> > > cwbUN_EURtnCode = c_func(xcwbUN_DisplayCommandPrompter,
> > >                 {system_handle, prompt, xcommand,
> > >                 xdate_format, xbatch})
> > > 
> > 
> > It's the c_func() call.  The problem is I don't know which parms is causing
> > the problem and I've double and triple checked the parms.
> > 
> > Jonas Temple
> > <a href="http://www.yhti.net/~jktemple">http://www.yhti.net/~jktemple</a>
> 
> Make sure you are not getting zero back for the define_c_func call.
> 
> }}}
<eucode>xcwbUN_DisplayCommandPrompter = define_c_func(cwbunapi,
> "_cwbUN_DisplayCommandPrompter@20", {C_UINT,
> C_UINT, C_POINTER, C_POINTER, C_POINTER},C_UINT)
> if xcwbUN_DisplayCommandPrompter = -1 then
>     puts(2, "Couldn't get function handle!\n") -- or message box
> end if</eucode>
{{{

> 
> Check the DLL with a tool that lists DLL contents and make sure the name is
> right -- I've
> used DLL Export Viewer from <a
> href="http://www.nirsoft.net">http://www.nirsoft.net</a>.
> (Win9x used to have Quickview that did this -- I wish XP did!)

Sorry, check for -1, not 0.

--
"Any programming problem can be solved by adding a level of indirection."
--anonymous
"Any performance problem can be solved by removing a level of indirection."
--M. Haertel
"Premature optimization is the root of all evil in programming."
--C.A.R. Hoare
j.