I'm working on som printing code that doesn't behave correctly when used against certain HP drivers. The PrintDlgEx structure will actually come back empty in some cases when a printer is selected. We can duplicate the behavior in a simple test program that has allowed us to track it back to the printer being selected (in this case a M9040). It always works on the first try, but on subsequent attempts it fails.
How and who do I contact at HP to report this as a bug?
Nobody. HP is not interested in fixing old drivers. They only want to write new ones to support the new hardware they are releasing.
I tried it all the way up to Carley Fiona when I had some problems. I;m still waiting for the bug fixes.
Mycroft is right, more or less. If it's a recent device you can sometimes get a little action, if it's an older unit then your probably out of luck. In these instances we just write our own driver typically using the Minidriver Development Tool.