Release 10.1A: OpenEdge Development:
Programming Interfaces

Conversions from COM to Progress data types

Table A–2 lists the possible conversions from COM data types to Progress data types when accessing COM object properties, method return values, method output parameters, and event input parameters.

If the destination Progress data item has a different data type than the one listed in Table A–2, Progress tries to convert it. Also, if the COM data type returned to Progress does not match any of the COM data types listed in Table A–2, the Progress data item receives the Unknown value (?).

Note: The names for COM data types in Table A–2 conform to a nomenclature used in the documentation for most COM objects. For matching alternatives to these names, seen in some documentation and COM object viewers, see Table A–3.

Table A–2: Conversions from COM to Progress data types

COM data type	Progress data type
Boolean	LOGICAL
Byte	INTEGER
Byte[]	RAW
Currency	DECIMAL
Date	DATETIME
Double	DECIMAL
Integer (2-byte integer)	INTEGER
Long (4-byte integer)	INTEGER
Object (Base)	COM-HANDLE
Object (COM)	COM-HANDLE
Single (Float)	DECIMAL
String	CHARACTER
Unsigned Byte	INTEGER
Unsigned Long (4-byte integer)	INTEGER
Unsigned Short (2-byte integer)	INTEGER

Note: Progress resolves any Pointer or Variant Pointer references to COM data types, then converts the value to the corresponding Progress data type.