System.TCallDesc.ArgTypes

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Delphi

ArgTypes: array[0..255] of Byte;

C++

System::StaticArray<Byte, 256> ArgTypes;

Properties

Type	Visibility	Source	Unit	Parent
field	public	System.pas System.hpp	System	TCallDesc

Description

Types of the call arguments.

The table below lists all possible values.

Constant	Type
varEmpty	Undefined.
varNull	Null.
varSmallint	2-byte signed integer.
varInteger	4-byte signed integer.
varSingle	4-byte IEEE floating-point number.
varDouble	8-byte IEEE floating-point number.
varCurrency	Currency.
varDate	Date.
varOleStr	OLE string.
varDispatch	Pointer to an object that implements the IDispatch interface.
varError	HResult.
varBoolean	Boolean.
varVariant	Variant. Note: You must always use the varByRef bit flag with this type.
varUnknown	Pointer to an object that implements the IUnknown interface.
varShortInt	1-byte integer.
varByte	1-byte unsigned integer.
varWord	2-byte unsigned integer.
varLongWord	4-byte unsigned integer.
varInt64	8-byte signed integer.
varUInt64	8-byte unsigned integer.
varRecord	BRECORD.
varStrArg	String.
varObject	Object.
varUStrArg	Unicode string.

You can apply any of the following bit flags to these constants:

• varByRef specifies that the argument is passed by reference and not by value.
• varArray specified that the argument is an array of items of the specified type.