Java calling PowerPoint API (via VBA or C#) ?

[Oleg Konovalov]

Hi

I am writing a Java application which among many other thing
has to call some MS Office [PowerPoint] internal methods,
which only seems to be possible from either VBA or C#

Can anybody suggest a way of Java calling VBA or C#

I do know how to call an executable from Java
or Java interface with C/C++ through JNI

Thank you in advance
Oleg

P.S.: If you know how to call PowerPoint from Java or VC++
please speak out too