Hello, I had the same problem with MSCOMM registration and I arrive to use it in VBA form. Follows the next tip to register the MSCOMM Control OCX
Copy MSCOMM32.OCX in system 32 director
In Execute Form (Start - Execute) use the command
C:\WINDOWS\SYSTEM32\REGSVR32.EXE C:\WINDOWS\SYSTEM32\MSCOMM32.OC
Use REGEDIT command in Execute form to add the following key in the acces HKEY_CLASSES_ROOT - Licenses
Key name : 4250E830-6AC2-11cf-8ADB-00AA00C0090
Reg_SEXPAND_SZ value : kjljvjjjoquqmjjjvpqqkqmqykypoqjquou

Now, restart systems and you can use the MSCOMM Control In VBA Application ;)