Are ActiveX controls written in the Java programming language portable across platforms?
Currently, ActiveX is essentially a Window/X86 platform specific architecture. Due to the platform specific nature of ActiveX, this inherently limits ActiveX control portability. ActiveX controls require platform specific calls that are unique to each environment, even if they are written in the Java programming language. To the extent that Microsoft does make ActiveX available on other PC or UNIX platforms, these controls, even if they are written in the Java programming language, will not be fully portable.