If you are creating a  BlackBerry device
    application from code generated directly from mobile business objects (MBOs), add a main file to the application.
        
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                From the   BlackBerry project that contains your generated MBO code, for example   supOptions, add a new file by right-clicking the project and selecting Create new file in project.
            
 
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                Name the file, for example, BBMain. Click OK.
                 This file is the main entry point to the device application. 
            
 
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                Import the common BlackBerry device application development packages as well as the package that contains your MBOs (for example, com.custom.MBO.*).
                 You can now create the code to connect to Unwired Server, access  and synchronize  your MBOs, and perform other functions.