TObject Class Summary

As a summary104, this is the complete interface of the TObject class in Delphi 2009 (notice the different string data types used):


TObject = class constructor Create; procedure Free;

class function InitInstance(lnstance: Pointer):

TObject; procedure Cleanuplnstance; function ClassType: TClass; inline; class function ClassName: string; class function ClassNamels(const Name: string): Boolean;

class function ClassParent: TClass; class function Classlnfo: Pointer; class function InstanceSize: Longint; inline; class function InheritsFrom(AClass: TClass): Boolean; class function MethodAddress(

const Name: ShortString): Pointer; overload; class function MethodAddress(const Name: string):

Pointer; overload; class function MethodName(Address: Pointer): string; function Fie1dAddress(const Name: ShortString):

Pointer; overload; function Fie1dAddress(const Name: string):

Pointer; overload; function GetInterface(const IID: TGUID; out Obj): Boolean;

class function GetInterfaceEntry(const IID: TGUID):

PInterfaceEntry; class function GetInterfaceTable: PInterfaceTable; class function UnitName: string; function Equa1s(Obj: TObject): Boolean; virtual; function GetHashCode: Integer; virtual; function ToString: string; virtual; function SafeCa1lException(ExceptObject: TObject;

ExceptAddr: Pointer): HResult; virtual; procedure AfterConstruction; virtual; procedure BeforeDestruction; virtual;

104 Another set of changes affects the internal layout of the class reference data in Delphi 2009. For example, the vmtParent location was -36 in previous versions, but is -48 in Delphi 2009. If you use the symbolic vmt entries, your code will compile unchanged, but if you used the equivalent numeric locations you'll likely get into trouble.

procedure Dispatch(var Message); virtual; procedure DefaultHandler(var Message); virtual; class function Newlnstance: TObject; virtual; procedure Freelnstance; virtual; destructor Destroy; virtual; end;

Overloaded methods like MethodAddress and FieldAddress can take either a UnicodeString (UTF-16, as usual) or a ShortString parameter that is treated as a UTF-8 string. In fact, the versions taking a plain Unicode string, convert them by calling the function UTF8EncodeToShortString:

function TObject.FieldAddress( const Name: string): Pointer; begi n

Result := FieldAddress(UTF8EncodeToShortString(Name)); end;

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