Release 10.1A: OpenEdge Development:
.NET Open Clients

Creating variables for parameters

Before passing a parameter, you must create a variable of the correct .NET data type. If you want to pass the Progress Unknown value (?) (null in .NET) for .NET value types (System.Boolean, System.Decimal, System.Int32, System.Int64, and System.DateTime), you must use the corresponding holder object. The Progress to .NET mappings are the same as the ones defined for passing parameters to Open Client proxy methods. For more information on the supported mappings between Progress 4GL and .NET data types, see Chapter 4, " Passing Parameters."