put_InstrumentIDList - what can be passed to this function? Is it possible to ask for all instruments starting with "A*" or ending with "*.COL" ?
put_DisplayParam - Is there any manual of possible display parameters? C++ example has RH:In CH:Fd - what do they mean?
Refer to the Developer's Guide, InstrumentIDList contains single or multiple instruments to be used in an RData request. Commas or semi-colons are used as field separators. It doesn't support wildcards.
For DisplayParam, you can also refer to the Developer's Guide or Thomson Reuters Eikon - Microsoft Office Help page in Display Parameters for RData at PARAMETERS > PARAMETERS BY FUNCTION > RDATA PARAMETERS (FOR LEGACY DATA).