Hi,
I'm the person who is wanting this.
I've made a start, connecting a test VB6 program to "libnlopt-0.dll".
I've almost got it working in VB6 for the tutorial example.
The key functions I use are
AddressOf 'For defining the call-back functions for
objective function and constraints
VarPtr 'For converting VB variables into the pointers
that the DLL needs
RtlMoveMemory 'For getting the values from the pointers passed
back from the DLL, and assigning new values to the variables represented
by the pointers
So far it goes successfully through two steps of the optimisation and
constraint testing.
Unfortunately, it then crashes with a memory read error, which has me
stumped.
Has anyone got any bright ideas?
I can post the code somewhere if you tell me where.
Or send it on an email if that is better?
Another question: Has anyone done a Visual studio project of
"libnlopt-0.dll"?
That might make debugging easier.
Regards,
Anthony Waters
KBC Energy Services
Email: [email protected]
Tel: +44 (0)1606 815100
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Mathew
Mazur
Sent: 27 October 2010 08:47
To: [email protected]
Subject: [NLopt-discuss] vb/excel support
has NLOPT got support for VB/VBA so that it may be used within excel? If
not what would be the best approach to make it compatible?
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