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Error while trying to register ActiveX control in Excel 365
Hello,
I would like to use a custom ActiveX control (used for communicating with serial devices) within Excel 365. When I attempt to add the control, it does not show in the ActiveX list, even though it is properly registered in SysWow64. When I select "Register Custom" and navigate to the file ( an *.ocx file in the SysWow64 folder), I get the error message, "The selected file does not contain any self-registering ActiveX controls." I have tried signing the control (EV code signing certificate), compiling an x64 version (Windows 11/Office 365), If I install an old version of office (2016 and 2013), I can add the control without issue. Does anyone know of a solution to get my control to work with Office 365?
- You'll have to install the 32 bit version of Office. Nowadays, Office defaults to 64 bit.
3 Replies
- You'll have to install the 32 bit version of Office. Nowadays, Office defaults to 64 bit.
- Thank you for your response. That was the one thing I had not tried. After installing the 32-bit version on Windows 11, I was able to use my activex control without issue. I am interested in knowing, however, why wouldn't a 64 bit build of the control (registered and signed) work in the 64-bit version of Office? Is there a limitation of COM objects to only work in 32-bit?
- If there really is a dedicated 64 bit version of the control, then it *should* work. But you must contact the owner of the control for that.
