Release 10.1A: OpenEdge Development:
Programming Interfaces

Conversions from Progress to COM data types

Table A–1 lists the possible conversions from Progress data types to COM data types when setting COM object properties, passing method input parameters, or returning event output parameters.

In addition to the listed conversion pairs, Progress can convert other Progress data types to COM data types when the target COM data type is known and the data is compatible. For example, a character string with the value “123” can be converted to a Currency COM data type, even though Table A–1 does not show a default CHARACTER to Currency conversion pair.

Note: The names for COM data types in Table A–1 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–1: Conversions from Progress to COM data types

Progress data type	Conversion information	COM data type
CHARACTER	None (default)	String
COM-HANDLE	None (default)	Object (COM)
COM-HANDLE	Type specifier: AS UNKNOWN or Type Library: Object (Base)	Object (Base)
DATE DATETIME DATETIME-TZ	None (default)	Date
DECIMAL	None (default)	Double (8-byte floating point)
DECIMAL	Type specifier: AS CURRENCY or Type Library: Currency	Currency (8-byte integer with fixed decimal point)
DECIMAL	Type specifier: AS FLOAT or Type Library: Single (Float)	Single (Float)
INTEGER	None (default)	Byte
INTEGER	None (default)	Long (4-byte integer)
INTEGER	None (default)	Unsigned Long (4-byte integer)
INTEGER	None (default)	Unsigned Short (2-byte integer)
INTEGER	Type specifier: AS ERROR-CODE or Type Library: Error Code	Error Code
INTEGER	Type specifier: AS SHORT or Type Library: Integer (2-byte integer)	Integer (2-byte integer)
INTEGER	Type specifier: AS UNSIGNED-BYTE or Type Library: Unsigned Byte	Unsigned Byte
LOGICAL	None (default)	Boolean (2-byte integer)
LONGCHAR	None (default)	String
RAW	None (default)	Array of bytes
<ANYTYPE>	Type specifier: BY-VARIANT-POINTER	Variant