I wrote a user interface with a microcontroller and I
can't use the compiled executable on an machine besides
the one used to develop the program.

Hi,

You have to properly deploy MSComm32.ocx and its wrapper DLL
(AxInterop.MSCommLib.dll).  How are you installing files on the target
system?  ActiveX controls still are COM objects, and must be registered.
Thus, MSComm32.ocx must be registered when it is installed.

--
Richard Grier  (Microsoft Visual Basic MVP)

See www.hardandsoftware.net for contact information.

Author of Visual Basic Programmer's Guide to Serial Communications, 3rd
Edition ISBN 1-890422-27-4 (391 pages) published February 2002.