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Client server interface

The BlackBerry AtHoc client server interface API (CSI) refers to the specification described in the 
AtHoc Client Server Interface (CSI) Protocol - Technical Specification
.
CSI includes Sign On (SO), Check Update (CU), Get Update (GU), and Get Service (GS). 
The desktop app uses Microsoft’s WinInet API to communicate with the BlackBerry AtHoc server. The desktop app assembles a query string according to the CSI specification for the particular operation (SO, CU, GU, or GS) and appends it to the Base URL and passes that in the WinInet InternetConnect API call.