System.TVarType

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Object Pascal

type TVarType = Word;

C++

typedef Word TVarType;

Properties

Type Visibility Source Unit Parent
type
typedef
public
System.pas
System.hpp
System System

Description

Is a variant type code.

TVarType is used by TVarData and TCustomVariantTypeClass to represent variant type codes.

The type of a variant can be set as in the following code (Object Pascal):

{ The type of Variant V is set to String }
TVarData(V).VType := varString;

The variant types are described in the following table:


Variant Type Description
varEmpty The variant is Unassigned.
varNull The variant is Null.
varAny Represents a Variant that can hold any value.
varSmallint 16-bit signed integer (type Smallint in Delphi, short in C++).
varInteger 32-bit signed integer (type Integer in Delphi, int in C++).
varSingle Single-precision floating-point value (type Single in Delphi, float in C++).
varDouble Double-precision floating-point value (type double).
varCurrency Currency floating-point value (type Currency).
varDate Date and time value (type TDateTime).
varOleStr Reference to a dynamically allocated UNICODE string.
varDispatch Reference to an Automation object (an IDispatch interface pointer).
varError Operating system error code.
varBoolean 16-bit Boolean (type WordBool).
varVariant Indicates another variant.
varUnknown Reference to an unknown object (an IInterface or IUnknown interface pointer).
varShortInt 8-bit signed integer (type ShortInt in Delphi or signed char in C++).
varByte A Byte.
varWord Unsigned 16-bit value (Word).
varLongWord Unsigned 32-bit value (type LongWord in Delphi or unsigned long in C++).
varInt64 64-bit signed integer (Int64 in Delphi or __int64 in C++).
varStrArg COM-compatible string.
varString Reference to a dynamically allocated string (not COM-compatible).
varArray Indicates a Variant array.
varByRef Indicates that the variant contains a reference as opposed to a value.
varTypeMask Indicates the type of each array element.

Note: The code of each variant type is listed on the System unit page (section Constants).

See Also