Why is the ParamType combobox disabled for some parameters?

[aoven]

We sometimes need our queries to return some less common types of values as parameters, for example GUIDs and Blobs. When setting up the parameters at design-time, the editor disables ParamType combobox when we set the data type to GUID or Blob. We must then set the ParamType to ptResult from code in order to receive the value.

My question is: what is the reason for this design-time limitation? Can it be lifted?

[Antaeus]

Parameter types cannot be set for those data types, which cannot be edited in design time. We will correct this behaviour in one of the next builds of SDAC. Thank you for information.