CTX_Base :: SetDisplayState - - internal feature (not documented)
Return value:  Data state ( CTX_DisplayState  )
The data state is set to DSP_disabled, when the context is set to read only.
Implementation details
CTX_DisplayState 
CTX_Base  :: SetDisplayState ( CTX_DisplayState dspstate )
- dspstate
 - Data state
The data state is set to DSP_disabled, when the context is set to read only. 

