The wacom tablet driver does not work with pressure sensitivity on either Windows 7 or XP, when applications are run inside a sandbox.

I used to have this adjusted in Sandboxie so it would work on XP, but had to redo it for Windows 7 because certain names changed. Now I'm sharing so others might benefit as well, and because the "solutions" thus far posted here don't work for everyone or even at all.

The solution is quite straight forward, though it took several iterations of running the Resource Access Manager to figure it out.

Add these lines in your config file for Windows 7: (series 6 wacom driver)

OpenIpcPath=*\basenamedobjects\wacomprowintabconnectionmutex
OpenIpcPath=*\basenamedobjects\wacomprowintabconnectioncontrolblock
OpenIpcPath=*\basenamedobjects\wacomprowintabconnectionrequestevent
OpenIpcPath=*\basenamedobjects\wacomprowintabconnectionreadyevent

In Windows XP: (series 4 driver)

OpenIpcPath=\BaseNamedObjects\WacomWintabConnectionMutex
OpenIpcPath=\BaseNamedObjects\WacomWintabConnectionRequestEvent
OpenIpcPath=\BaseNamedObjects\WacomWintabConnectionReadyEvent
OpenIpcPath=\BaseNamedObjects\WacomWintabConnectionControlBlock
OpenIpcPath=$:Tablet.exe

The last line for XP may be optional. Test it out.

This is ALL you have to do for both platforms. No need to allow hardware access, which doesn't help anyway.

Enjoy

Thank you! As soon as we get some confirmations here that this is working well, I will add the suggested settings into Sandboxie.

I may have spoken too soon. The solution listed should work fine on Windows XP 32bit. However, on Windows 7, 64bit, I can only get pressure sensitivity in Zbrush and Artrage. I cannot get in either Photoshop or Painter. If I figure out a way, I will update here.

Try revising all of the lines so that they include another * wild card. Vista and Win 7 show these resources differently.
OpenIpcPath=*\basenamedobjects*\wacomprowintabconnectionmutex

Thanks, but I actually spoke too soon about speaking too soon

After I restarted my system, everything works again. Your info might come in handy down the road though or help someone else!

Interestingly, the lack of pressure sensitivity working was also accompanied by long pauses before the applications would fully launch. Eventually NO application would respond to the pressure. So, somewhere there is something, perhaps in one of the applications, that can mess it up for the rest. Maybe by monopolizing the wacom driver in some way, even after it has finished?! Or it could have been a freak occurrence from me messing around.

Currently, every application supports pressure sensitivity by adding the lines I mentioned in the first post. Though perhaps some folks will need to adjust slightly for their own configs.

I added these settings (+ auto detection) in version 3.65.07. Thanks again nnezz.