I put the code back up (https://github.com/ihnorton/COMCall.jl). The
interface query examples might help to get started, though I'm not sure if
they work with Julia 0.4.
On Thu, Feb 18, 2016 at 9:04 PM, Isaiah Norton <isaiah.nor...@gmail.com>
wrote:
> Is there any easy (or failing that, hard) way to do this?
>
>
> COM aside, the first issue is that this syntax isn't quite right:
>
>
>> ccall( ("SimpleLibrary.MyClass.MySum", "SimplyLibrary"), Float32, (1.2,
>> 3.1))
>
>
> There are a couple things to change here:
> - need argument types, as a tuple, after the return type.
> - `double` is equivalent to Float64 on all platforms, rather than Float32.
> (for convenience, there is a `Cdouble` alias)
> - argument values (or variables) need to be passed individually.
>
> So it should look like:
>
> ccall( ("SimpleLibrary.MyClass.MySum", "SimplyLibrary"), Cdouble,
> (Cdouble, Cdouble), 1.2, 3.1)
>
> The bigger issue here is going to be finding the function.
> "SimpleLibrary.MyClass.MySum" is probably not going to work (a C symbol
> won't look like that). Unless the DLL explicitly exports a C symbol, you
> will probably need to query the COM registry, then the interface, and build
> an appropriate dispatch table. See this article for a discussion of how to
> do it from C, which could be replicated in pure Julia:
> http://www.codeproject.com/Articles/13601/COM-in-plain-C
>
> (if you only need a few functions from a given interface, that should be
> straightforward, but a generic interface is a bit involved)
>
> On Thu, Feb 18, 2016 at 6:32 PM, Alex Mellnik <a.r.mell...@gmail.com>
> wrote:
>
>> Sorry to reopen an old thread. I'm trying to do something similar and
>> haven't been able to figure it out so far. Isaiah, I noticed that your
>> COMCall.jl library is not on GitHub anymore. Is this code still floating
>> around anywhere or is there a different suggested route?
>>
>> In my case, I have a dll (written in c# I think) which is currently being
>> called from Python using win32com
>> <http://docs.activestate.com/activepython/3.3/pywin32/html/com/win32com/HTML/QuickStartClientCom.html>.
>> I would like to call the dll directly from Julia without going through
>> PyCall (although this works). I don't have the source for that dll but a
>> simple example is:
>>
>> using System;
>> using System.Collections.Generic;
>> using System.Linq;
>> using System.Text;
>> using System.Threading.Tasks;
>>
>> namespace SimpleLibrary
>> {
>> public class MyClass
>> {
>> public static double MySum(double a, double b)
>> {
>> return a + b;
>> }
>>
>> public static double NoArgs()
>> {
>> return 1.4;
>> }
>>
>> }
>> }
>>
>> Naively trying to call these with ccal like
>>
>> ccall( ("SimpleLibrary.MyClass.MySum", "SimplyLibrary"), Float32, (1.2,
>> 3.1))
>>
>> gives a "wrong number of arguments" error. Is there any easy (or failing
>> that, hard) way to do this?
>>
>
>
