The following table shows a summary of the classes that support the .NET OpenAPI.

Table 1. .NET OpenAPI Classes
Class Description 
Progress.Open4GL.Proxy.OpenAppObject
 Accesses external ABL procedures in an application service using the OpenAPI 
Progress.Open4GL.Proxy.OpenProcObject
 Accesses an ABL persistent, single-run, or singleton procedure using the OpenAPI 
Progress.Open4GL.Proxy.ParamArray
An object containing an array for passing parameters to an ABL procedure or user-defined function 
Progress.Open4GL.Proxy.ParamArrayMode
Constants for specifying the mode of an ABL procedure or user-defined function parameter (INPUT, INPUT-OUTPUT, or OUTPUT) 
Progress.Open4GL.Parameter
 Constants for specifying the ABL data type of a procedure or user-defined function parameter, return type, or temp-table field 
Progress.Open4gl.ProcedureType
 A .NET enum for specifying a procedure type as Persistent, SingleRun, or Singleton 
Progress.Open4GL.Proxy.ProDataRelationMetaData
 To define a ProDataSet data-relation 
Progress.Open4GL.Proxy.ProDataSetMetaData
 To define the schema of an ABL ProDataSet mapped to an ADO.NET DataSet 
Progress.Open4GL.Proxy.TempTableMetaData
 To define the schema of an ABL temp-table mapped to an ADO.NET DataTable
The following table shows a summary of the enumerations that support the .NET OpenAPI.
Table 2. .NET OpenAPI Enumerations
Enumeration Description 
Progress.Open4GL.DynamicAPI.InputErrorResetPolicy
 A policy that controls what happens to the values in the ParamArray when an error occurs while processing a request to the application server. Possible values are:
  • RESET_ALWAYS - Reset parameters to NULL if an error occurs during processing.
  • RESET_MODIFIED - Only reset parameters to NULL if the ParamArray was modified during processing. This is the default.
Progress.Open4GL.DynamicAPI.OutputErrorResetPolicy A policy that controls what happens to the values in the ParamArray when an error occurs while processing a response from the application server. Possible values are:
  • RESET_ALWAYS - Reset parameters to NULL if an error occurs during processing.
  • RESET_MODIFIED - Only reset parameters to NULL if the ParamArray was modified during processing. This is the default.

The next topic describes how to use these classes to access an application server using the .NET OpenAPI.