Reach ActiveX or Form objects (textbox) from codebehind in an Excel document

Question

There are several textboxes in an excel file as ActiveX objects and I want to reach them from codebehind.

I am using ClosedXML for other fields, but I am open for ot

Answer 1

If you want use ClosedXML you can link textarea & cell with LinkedCell properties.

Like this :

See :