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You can redistribute COM.ahk, preferably as it is.

Hey Sean,

I'm trying to rewrite some functions to work with AHK_L and after several attempts and conulting with jethrow, I'm stuck. Can you create a call to COM_Invoke in COM_L combined with ternary? This is the line I'm trying to translate:



I'm having absolutely zero luck making something that will produce a result. I tried this:



That produces no errors but also no result. I also tried this (at jethrow's somewhat suggestion):



But again no luck. Am I missing something in how the syntax is implemented or is ternary not possible in the new implmentation?

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When I run your second code, I get this message:
It's missing a dot. However, I got "no errors but also no result" at first because I was using GetWebBrowser() and wasn't calling COM_Init(). It's only called automatically by COM_CreateObject().

Your third code has a syntax error. When you write ] (, it is implicitly concatenation; i.e.
I suppose there are two ways:
I didn't know what the usage of 'row' vs 'r' was, so I used 'r' in both. I think that passing the entire COM expression in a string via [] or COM_Invoke() is actually more efficient, as it doesn't need to wrap each intermediate COM object in an AHKL object.

Sorry for the confusion Lexikos, that snippet of code is being used inside a function. Probably no sooner than I had figured that out on my own, you had posted it. So that I have working, but I still have a problem. I'm trying to retrieve a type of data from a table cell on a website, but I need to keep the type optional in the COM call. For example this:



Would be like this:



And the above works. So if I want to pull data from a cell on the forum main page (using iWeb_getWin to obtain the window handle), the code would look something like this:



But that produces nothing. How would I pass the type in the call the same way I pass it in the 'traditional' call?

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Which build of AHK_L are you using? This code should produce a syntax error in older builds, and no syntax error with the latest build but I suppose the last call will be effectively COM_Release(). Use:

If the documentation is inadequate, I am open to suggestions...

FYI, obj[anything] should be equivalent to COM_Invoke(obj,anything). Using [] indirectly calls COM_Invoke, but you can still call it directly with COM_L. However, I think that including the "dotted expression" in a string isn't supported in AutoHotkey_COM, and I don't intend to change this when I integrate it into AHKL.

BTW, I think I got completely wrong about aResultToken.marker of SYM_STRING. What allocator/deallocator (:seems to be malloc/free?) should I use to pass the result string? I directly passed the resultant BSTR's (and freed them shortly after), and it worked so far by pure chance, due to the caching of BSTR's by COM.

Use TokenSetResult. If the string is <=MAX_NUMBER_LENGTH it uses a stack-allocated buffer which is passed to built-in functions via aResultToken.buf, so you must make sure that hasn't been overwritten. Otherwise it uses malloc and returns it via aResultToken.circuit_token and its length via aResultToken.buf. aResultToken.marker is set in both cases, but circuit_token tells ExpandExpression that malloc was used, and to free the memory later.

Thanks, now I changed to use it.

AutoHotkey_COM Update: A new function ComObjType is added.

Hello AHK Community,

i'm searching a way to comunicate with my tool virtual dj.
On the plugin devloper site http://www.virtualdj.com/wiki/Developers.html stands,

"Plugins in VirtualDJ look a lot like COM objects, so any languages that can create COM objects can create a plugin for VirtualDJ (Visual Basic, C#, etc).
Still, we highly recommend to use C++, since that's the native language of the header files, and that's also the language in which you'll find all the help on the forums here."

But how can i communicate to the program over ahk?

On the SDK Site i have found a C++ Header file. That can be found on http://www.virtualdj.com/developers/vdjPlugin.h

I have seen in 2 Main mehtods to communicate and become callbacks

Code:

// callback functions to communicate with VirtualDJ
HRESULT (VDJ_API *SendCommand)(char *command,int deck); // send a command to VirtualDJ
HRESULT (VDJ_API *GetInfo)(char *query,void *result); // get infos from VirtualDJ


Is it possible to comunicatw over the ahk com.ahk to virtual dj?

Thx for your help

Just a thought, but how about having COM Error messages available throught the COM library. Then calling COM_Error(1) could turn this functionallity on. This shouldn't be too much trouble for users who know about & use the error messages.

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Recommended: AutoHotkey_L
Basic Webpage Controls

if im not mistaken jethrow thats already the case
i commonly turn errors on and off within scripts

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Formal request to Polyethene

I suppose I should clarify. I mean with AutoHotkey_COM, which currently doesn't display COM Error messages. We discussed this back on page 35. I tried putting COM_Error( 1 ) at the beginning of my script, but with AutoHotkey_COM, the COM Error message still doesn't display.

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Recommended: AutoHotkey_L
Basic Webpage Controls

ah i see i didnt realise you were speaking of the ahk_com.exe
by sean

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Formal request to Polyethene

I haven't decided yet whether to include it or not. As you have to explicitly enable the error notification, through ComObjConnect(func_name), and write the error handling function yourself, I'm a little dubious about the usability of it, judging from the past experience on the average programming skills of the users in the forum.

For example, here is my own implementation. Err()/Err("") will turn on/off the error notification.


That can be done, but you still have to have included the function already in the script, via any means, and the function name and its parameters should be aleady-agreed ones, possibly ComError(name, hr, pei) (:I don't think COM_Error is a good candidate and currently it can be leaking memory when error notification is turned off).