 Checkbox Detection - Usage and purpose                           9th July 2018
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Purpose:

Because standard (GETCHECK/GETSTATE) detection of a checkbox state is not working,
I came up with an alternative method of detection.

This method requires the 'Demodulator' and 'Auto' checkboxes to be visible and unobstructed on the desktop.
That is, TETRA Demodulator panel must be expanded and checkboxes visible with no other windows covering them.

Each Windows version and custom themes can alter the values required for this to work correctly.
This is why it has been add to TETRA Trunk Trunker. And must be updated on theme change.

The default values are for Windows 7 Basic/Aero theme.

This checkbox test is accessed when TETRA Trunk Tracker is started via "Start" or when a reset occurs.
It is only used to configure CC, VC SDR#.
