LC Builder and 3rd Part DLLs under Windows

[Matthias Rebbe]

Trevor, 

thank you so much for your example and for verifying that LCB can execute handlers in the dll.

“Good luck” is well said, i need more than good luck. ;)

Regards,
Matthias


> Am 07.08.2018 um 19:52 schrieb Trevor DeVore via use-livecode <use-livecode at lists.runrev.com <mailto:use-livecode at lists.runrev.com>>:
> 
> Matthias,
> 
> I downloaded and installed the demo and was able to link to the DLL.
> 
> 1. Create a folder named `TBarCode`.
> 2. In that folder create a `code/x86-win32` folder.
> 3. Copy the `TBarCode11.dll` and `zlib1.dll` (not positive this is
> required) files from the Program Files(x86) folder (NOT the 64-bit
> versions) and place in the `./code/x86-win32` folder.
> 4. Create a file in the `TBarCode` folder named `tbarcode.lcb`
> 5. Place the following script in the `tbarcode.lcb` file and save it.
> 
> ```
> library community.livecode.tbarcode
> 
>  use com.livecode.foreign
>  use com.livecode.engine
>  use com.livecode.file
> 
>  metadata title is "TBarCode"
>  metadata author is ""
>  metadata version is "0.1.0"
> 
>  private foreign handler win_tbarcode_licenseMe(in pLicensee as
> ZStringUTF16, in pKindOfLicense as CULong, in pNoOfLicenses as CULong, \
>        in pKey as ZStringUTF16, in pProductID as CULong) \
>        returns CULong binds to “c:TBarCode11>BCLicenseMeW!stdcall"
> 
> 
>  public handler TestMe() returns String
>    variable tError as Number
> 
>    unsafe
>      put win_tbarcode_licenseMe("LicenseeName", 3, 1, "LicenseKey", 2023)
> into tError
>    end unsafe
>    log tError
>    return "success"
>  end handler
> end library
> ```
> 
> 6. Open tbarcode.lcb in the Extension Builder and test it by pressing the
> “Play” button on the bottom of the Extension Builder window.
> 7. In the Message Box run: `put TestMe()`
> 
> Assuming all is well you should see “success” appear with a “0” in the log
> field. I didn’t verify that I used the correct types for pKindOfLicense,
> pNoOfLicenses, and pProductId. I was just verifying that LCB would execute
> a handler in the DLL.
> 
> Ask or docs you can look at the following two docs on the web:
> 
> https://github.com/livecode/livecode/blob/develop/docs/guides/LiveCode%20Builder%20Language%20Reference.md <https://github.com/livecode/livecode/blob/develop/docs/guides/LiveCode%20Builder%20Language%20Reference.md>
> https://github.com/livecode/livecode-ide/blob/develop/Documentation/guides/Extending%20LiveCode.md
> 
> They are available as guides in the IDE docs but I find it easier to scan
> and search in the web browser.
> 
> Good luck!
> 
> -- 
> Trevor DeVore
> ScreenSteps
> www.screensteps.com
> 
> 
> On Tue, Aug 7, 2018 at 9:41 AM Matthias Rebbe via use-livecode <
> use-livecode at lists.runrev.com> wrote:
> 
>> Hi Trevor,
>> 
>> thank you very much for your offer.
>> 
>> I am interested in using the Barcode SDK for Windows from TEC-IT.
>> https://www.tec-it.com/en/download/tbarcode/Download.aspx <
>> https://www.tec-it.com/en/download/tbarcode/Download.aspx>
>> 
>> Regards,
>> 
>> Matthias
>> 
>> 
>> 
>>> Am 07.08.2018 um 16:23 schrieb Trevor DeVore via use-livecode <
>> use-livecode at lists.runrev.com>:
>>> 
>>> Matthias,
>>> 
>>> Yes it is possible. I don't know of any 3rd party DLL examples. Can you
>>> point me to a DLL you want to wrap? I may be able to put together the
>>> skeleton of an LCB extension for you to get started with.
>>> 
>>> --
>>> Trevor DeVore
>>> ScreenSteps
>>> www.screensteps.com
>>> 
>>> On Tue, Aug 7, 2018 at 5:33 AM Matthias Rebbe via use-livecode <
>>> use-livecode at lists.runrev.com> wrote:
>>> 
>>>> Hi,
>>>> 
>>>> i make use of  the Widgets in LC 9 very often and i am really impressed
>>>> what is possible with LCB.
>>>> I have no deep knowledge of LCB, but if i understand correctly then LCB
>> is
>>>> able to call OS APIs, right?
>>>> 
>>>> If so, is it also possible to call functions of a 3rd party DLL under
>>>> Windows?
>>>> 
>>>> I know there is a very nice but old example on Ken Ray´s page  how to
>> use
>>>> external DLLs  in LC,
>>>> 
>>>> But now with LCB i would prefer LCB to do the complete “wrapping”.
>>>> 
>>>> So would it be possible? And if so, are there any examples available
>>>> already?
>>>> 
>>>> Regards,
>>>> 
>>>> Matthias
>>>> _______________________________________________
>>>> use-livecode mailing list
>>>> use-livecode at lists.runrev.com
>>>> Please visit this url to subscribe, unsubscribe and manage your
>>>> subscription preferences:
>>>> http://lists.runrev.com/mailman/listinfo/use-livecode
>>> _______________________________________________
>>> use-livecode mailing list
>>> use-livecode at lists.runrev.com
>>> Please visit this url to subscribe, unsubscribe and manage your
>> subscription preferences:
>>> http://lists.runrev.com/mailman/listinfo/use-livecode
>> 
>> _______________________________________________
>> use-livecode mailing list
>> use-livecode at lists.runrev.com
>> Please visit this url to subscribe, unsubscribe and manage your
>> subscription preferences:
>> http://lists.runrev.com/mailman/listinfo/use-livecode
> _______________________________________________
> use-livecode mailing list
> use-livecode at lists.runrev.com
> Please visit this url to subscribe, unsubscribe and manage your subscription preferences:
> http://lists.runrev.com/mailman/listinfo/use-livecode

Matthias Rebbe
Tel +49 5741 310000
‌https://matthiasrebbe.eu <https://matthiasrebbe.eu/>‌