Access to Window Mobile devices

Access to Windows Mobile devices is only possible via alias.

They were shown in foldertree when connected and not when disconnected. I need this behaviour for drivebuttons (hide when empty like on cardreaders). Is this possible?

Does Windows assign a drive letter to your Windows Mobile device?
When Windows doesn't assign a drive letter, DOpus doesn't add a button to the Drives toolbar, I think.

When I plug my camera in, it is shown in the foldertree when connected and not when disconnected. But
windows doesn't assign a drive letter to my camera, so DOpus doesn't add a button to the Drives toolbar.

Off Topic:

Virtual Drive Manager (VDM) is a tiny but very useful freeware utility used to create virtual drives - maps of the contents of folders. Drive-mapping is similar to the DOS command SUBST, but VDM is much more than SUBST, it is very easy to use with a good GUI interface and it can restore all virtual drives automatically on windows restarting.

http://www.linasoft.com/products.php#vdm

So, if you would like to access folders as drives in the DOpus Drives toolbar, you could use this utility.