Reader X, sandbox and SendMessage()

Question

Hi.
How can I keep my plugin running under Reader X, without disabling the protected mode?
At some point in my plugin code I use SendMessage() with WM_COPYDATA to send some data to my main proccess.
My main process response to this message by poping a window....
BUT because of the new "protected mode" I get error code of 1400 (which means Invalid window handle) when the
command SendMessage() executes. I checked with Spy++ the window handle is valid of course.
When I disable the protected mode the plugin work perfect (like it used to work in Acrobat 9,8,7...)
I read everything on the policy file that should be set for the process broker. I wrote on but it doesn't help me because
I don't need to run a process, nor writing a file or writing to a registry - I just need SendMessage() to work!
I dowloaded SDK X and found no samples no documentation on that - how come?
I read somewhere that an API ADDRULE(...) should be used to config the broker but found nothing on that in the SDK.
Is there a chance to make it work? again - without disabling the protected mode but just make a specific request to the broker to allow
my api call get through ?
thanks a lot
eran

Answer 1

Due to the restrictions of the protected mode (sandbox) process, it is not possible for plugin code to SendMessage/PostMessage to windows not belong to the sandbox process. Also, configurable whitelists currently have no rule that allows such cross-process message sending.
If the other application and the Reader plugin are both under your control (cooperative), you could implement the inter-process communication via some means (other than windows messages) like named pipes or shared memory and add custom rules in the configurable whitelist file to enable access to these specific pipe or section objects.