Actxcontrol - data transfer to an instrument

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Kang Soo Lee 2021-2-11

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https://ww2.mathworks.cn/matlabcentral/answers/743107-actxcontrol-data-transfer-to-an-instrument

回答： Pratheek Punchathody 2021-2-16

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Hello,

I need a help regarding a format for a variable to transfer input data to my instrument.

I am trying to communicate via ActiveX with my instrument (Raman microspectroscope). When I enter

LabSpec = actxcontrol('NFACTIVEX.NFActiveXCtrl.1', [15 15 410 390]);
LabSpec.invoke

It says

PutValue(handle, int32, ustring, Variant(Pointer))

Given this, when I enter

PutValue(LabSpec, 0, 'ShutterMode', 1)

It says

Error using COM.NFACTIVEX_NFActiveXCtrl_1/PutValue
Error: Type mismatch, argument 3

I think the last argument was incorrectly inserted. If I need to give "1" (for the argument 3) to the instrument, what type of variable should I use for "Variant(Pointer)"?

Anyone has a good suggestion?

Thanks!

Kang

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Mario Malic 2021-2-14

Hope you have already resolved your issue.

I encountered an example of documentation that you need, unfortunately not for the same program, just so you can see that you really need to find (maybe it exists in the program manual).

https://docs.microsoft.com/en-us/office/vba/api/excel.workbook.saveas, If you take a look at FileFormat, see the description that'll lead you to another link with so many different inputs that do different thing.

Kang Soo Lee 2021-2-14

Hi Mario,

Thanks for your geneous helps! I have not yet solved my issue. I see your points and I have decided to contact the manufacturer with what I have been collecting. Indeed, they provide a document for ActiveX-based controls of the system, but it did not very useful to solve this issue. I will make a note here when I hear a solution. Thanks again!

Cheers,

Kang

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回答（1 个）

Pratheek Punchathody 2021-2-16

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/743107-actxcontrol-data-transfer-to-an-instrument#answer_624537

As the documentation says actxcontrol To be Removed from Matlab in future releases.

As a workaround to this, If the control does not have UI interaction involved, you can load the control using 'actxserver' in invisible mode and call its properties and methods on your demand. The difference between 'actxcontrol' and 'actxserver' is there will be no figure window. But you are still able to get a handle of control in MATLAB. For more details with 'actxserver',

Refer to the documentation on actxserver for further details.