Accessing image data in SDS

#1
Hello everyone,
I'm pretty new to ADS/SDS programming, so I was surprised, how small the sds.h is.

Functions for creating entites are there, accessing system variables also.
But, when I need to access images inside an ICad drawing and use it's pixels to combine with other entities like splines, I couldn't find API functions to do it.

The only way , - it seems- , to set up a COM interface and use its interface classes for splines, images, etc.
But, that can't be true, how could they develop those apps for ACAD before COM or ARX hase arrived?
Am I missing a doc or header somewhere?
Thanks in advance.
ctm442
cron