We really have no idea what you are trying to do, so it's impossible to say.  There's a lot you can do with strings and arguments.  You can pass either a JSON or XMLstring to a function and parse the string to get the arguments' types and values.  Again, no idea what you are trying to do, but hopefully that will help for your datawindow arguments.

As we need to use datawindow.table.arguments to get the datatype, so need to use Any at the beginning. Thanks for replying. Then it we need decide the datatype by the datawindow argument, we need to change that logical?

Thanks,

Sally

.NET doesn't know what a PB Any datatype is, so it won't work.  You need to make your function more specific and return a datatype .NET can work with.