Cory, thanks for your detailed reply. I've managed to get nearly all the repetitive tasks implemented in MEP. All the edits of a record are done by opening subform windows that contain a subset of the fields. About half of them need an initial positioning with the mouse to the top right corner of the subform followed by a hotkey activation and then using 'Relative to last position' moves. When timing is variable, e.g. waiting for subforms to open or close, I use Pause | Resume (via the Enter key).
I might explore the browser extension and .NET options having programmed extensively in VBA, mainly in Access and Excel. I've tried HTTP in another context but found it a bit like programming in assembly language; i.e. very labour intensive, particularly when negotiating with secure systems.
Thanks for your suggestions.