Progress
External Program
Interfaces


General Conversion Features and Limitations

If you set a method input parameter, an event output parameter, or a property to the unknown value (?), Progress converts this value to the COM Null value. Similarly, if a COM object returns a Null value in a method output parameter, an event input parameter, or a property, Progress converts this value to the unknown value (?).

Progress does not support conversions between COM Array data types and any Progress data type, including data types with extents (like AS INTEGER EXTENT 5).

When the Progress COM Object Viewer suggests the syntax for a property or method reference or the AppBuilder generates a template for an OCX event procedure, it indicates any method parameter or property with an undetermined data type using the place holder, <anytype>. You must replace <anytype> with a valid Progress data type in your code. For more information on the Progress COM Object Viewer, see Using COM Objects In the 4GL." For more information on OCX event procedure templates, see ActiveX Control Support."


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