[sane-devel] Setting up a Control message

[René Kjellerup]

I've found out that the communication to the CanoScan 4200F scanner
most likely happens through control messages. And I've tried to set up
my program to emulate this, but with my limited knowledge of how USB
communication works. 

I'd like to how to set up a control msg. But what are requestType / 
request / index / value parameters to usb_control_msg() used for?

And where in a usbsniffer.log would they likely be noted?

High hopes
René Kjellerup
-- 
-- as life grows older, I gain experience.
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