Homemade VS.NET modbus software targets WINCE powered PLC

Dear gentlemen,

In my hands there is some kind of PLC that runs under WINCE. It does have serial, ethernet, usb ports. Also it features 16 discrete inputs and GPRS-modem. Please have a look at screnshots below:
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When it's powered on, I connect it with ethernet-port and launch CER-host application.
After connection is succeded I am exposed to WinCE desktop on PLC. Please have a look at the screenshots below:
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Can you kindly take me to general understanding, what approach could lead me to targeting PLC-s compact framework, while I try to design an application to be executed on PLC, but developped on my laptop with means of VS 2010 .NET?
The application to be developped would feature the same functionality as in:
https://control.com/forums/threads/...-measuring-device-via-modbus-tcp.49152/page-6
posts: 102-108.

Yours faithfully,
N. Qv.
 
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