Hello, There are several alias types that would be very useful to have (for the sake of code clarity), but currently they are not available in a central library. I'm thinking that OpconBaseCommonDef is the best place for these. Currently it only has SIZE_T and EVENTADDLTEXT_T, which are really generally useful. And maybe sometimes OOID_T. I suggest adding these: BinIoIndex_T: used whenever a IDX_ variable of BinIo is expected, e.g. when passing them around in ParCfg EventHandle_T: used for return value of SetEvent etc. and as input for ClearEvent RetValState_T: used whenever a function/method returns a value that is meant to be assigned to _retVal directly, so can be OK, RUNNING, JUMP1-9 and any negative value in case of error (method should still describe which of these it uses) AsyncState_T: used as return value of functions/methods that should be called continously and report the status of execution, so can be 0 (OK), 1 (RUNNING) or any negative value to indicate error Here are some more, but I am feeling much less strongly about those: EventNumber_T: For all event numbers InstanceId_T: For object instance IDs Command_T, Mode_T: For every place where you need to handle a Cmd or Mode enum All changes would be perfectly backwards-compatible but enhance future programs, because we can use these types to annotate our variables and method parameters. What do you think about this proposal? Any other types that would be useful?
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