TMSFNCMemo does not function correctly when placed on a form that has its FormStyle set to MDIChild.
We have tested this with the latest version in Delphi 11 in a new VCL MDI template form and dropped a TTMSFNCMemo instance on the CHILDWIN form, ran the application and could succesfully initialize and work with the memo. Please provide more information
It was my mistake. I had not yet upgraded from the beta.