How to return a bool value from MyBrokerProcess

To make MyPlugin work in Adobe Reader X in Protected Mode On, i have created a Broker Process(MyBrokerProcess.exe)
Plugincode(C++)--->BrokerProcess(C#)---->Helper(C#)
MyPlugin has 4 button, when i click on each button a Window(System.Window.Form) will open and perform its task.
1.While i trying to close the ActivePDF document , if any of the Windows(System.Window.Form) is open i will display the message saying("Choose YES to Close this Window first Before Closing the ActiveDoc and Choose NO to continue without closing Window and ActiveDoc"). This is taken care in Helper Class(C#)
2.If the user choose "Yes", then the Helper functin will return 'true' to MyBrokerProcess.
3.Inturn MyBrokerProcess has to return this bool value to the PluginCode(C++) which is the only place to access Acrobat API function to close the ActiveDocument.
Now i am clueless as to how i have to return this bool value from MyBrokerProcess to PluginCode. Or is there any other way to accomplish the above task. Please some one help me to solve this issue.
Thanks in advance.

Hi Richard,
This is what i tried to do. But i couldnot make MyPlugin work in Protected Mode On.
Plugincode(C++)<--->BrokerProcess(C#)<---->Helper(C#)
I added a simple Process between Plugin(C++)code and Helper(C#)code.
Previously it was like
Plugincode(C++) <----> Helper(C#)
Thanks and Regards,
Chetan.

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