System.Variants.IVarInvokeable.DoFunction

• Up to Parent: IVarInvokeable

Delphi

function DoFunction(var Dest: TVarData; const V: TVarData;
const Name: string; const Arguments: TVarDataArray): Boolean;

C++

virtual bool __fastcall DoFunction(TVarData &Dest, const TVarData &V, const System::UnicodeString Name, const TVarDataArray Arguments) = 0 ;

Properties

Type	Visibility	Source	Unit	Parent
function	public	System.Variants.pas System.Variants.hpp	System.Variants	IVarInvokeable

Description

Implements all the methods that return values.

Implement DoFunction to provide the implementation for method calls that return values. When the application invokes a Variant member function (Delphi) or calls the Variant's Exec method (C++), a call is automatically generated to DoFunction.

The following table lists the parameters expected by this method.

Value	Meaning
Dest	TVarData record that receives the value returned by the function.
V	The TVarData record from the Variant instance that was used to call the function.
Name	The name of the function being called.
Arguments	Dynamic array of TVarData records, where each one represents the value of an argument passed to the function.

DoFunction returns True if it executes the method call, or False if it does not implement the specified function.

See Also

• DoFunction

• Exec

• Supporting Properties and Methods in Custom Variants