OpenEuphoria

Re: An old C function problem revisited

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

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.

xcwbUN_DisplayCommandPrompter = define_c_func(cwbunapi,
"_cwbUN_DisplayCommandPrompter@20", {C_UINT, C_UINT, C_POINTER, C_POINTER,
C_POINTER},C_UINT)
if xcwbUN_DisplayCommandPrompter = 0 then
    puts(2, "Couldn't get function handle!\n") -- or message box
end if

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

--
"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.