ユニットを作る UEventsSink
unit UEventsSink;
interface
uses
ActiveX, windows, ComObj, SysUtils;
type
IApplicationEvents = interface(IDispatch)
['{000209F7-0000-0000-C000-000000000046}']
procedure Quit; safecall;
end;
TApplicationEventsQuitEvent = procedure (Sender : TObject) of object;
TEventSink = class(TObject, IUnknown, IDispatch)
private
FCookie : integer;
FSinkIID : TGUID;
FQuit : TApplicationEventsQuitEvent;
// IUnknown methods
function _AddRef: Integer; stdcall;
function _Release: Integer; stdcall;
function QueryInterface(const IID: TGUID; out Obj): HResult; stdcall;
// IDispatch methods
function GetTypeInfoCount(out Count: Integer): HResult; stdcall;
function GetTypeInfo(Index, LocaleID: Integer; out TypeInfo): HResult; stdcall;
function GetIDsOfNames(const IID: TGUID; Names: Pointer;
NameCount, LocaleID: Integer; DispIDs: Pointer): HResult; stdcall;
function Invoke(DispID: Integer; const IID: TGUID; LocaleID: Integer; Flag: Word;
var Params; VarResult, ExceptInfo, ArgErr: Pointer): HResult; stdcall;
protected
FCP : IConnectionPoint;
FSource : IUnknown;
procedure DoQuit; stdcall;
public
constructor Create;
procedure Connect (pSource : IUnknown);
procedure Disconnect;
property Quit : TApplicationEventsQuitEvent read FQuit write FQuit;
end;
implementation
function TEventSink.QueryInterface(const IID: TGUID; out Obj): HResult;
begin
if GetInterface(IID, Obj) then
Result:= S_OK
else if IsEqualIID(IID, FSinkIID) then
Result:= QueryInterface(IDispatch, Obj)
else
Result:= E_NOINTERFACE;
end;
// GetTypeInfoCount
//
function TEventSink.GetTypeInfoCount(out Count: Integer): HResult;
begin
Result := E_NOTIMPL;
Count := 0;
end;
// GetTypeInfo
//
function TEventSink.GetTypeInfo(Index, LocaleID: Integer; out TypeInfo): HResult;
begin
Result := E_NOTIMPL;
pointer (TypeInfo) := NIL;
end;
// GetIDsOfNames
//
function TEventSink.GetIDsOfNames(const IID: TGUID; Names: Pointer;
NameCount, LocaleID: Integer; DispIDs: Pointer): HResult; stdcall;
begin
Result := E_NOTIMPL;
end;
function TEventSink.Invoke(DispID: Integer; const IID: TGUID; LocaleID: Integer;
Flag: Word; var Params; VarResult, ExceptInfo, ArgErr: Pointer): HResult;
begin
Result:= DISP_E_MEMBERNOTFOUND;
case DispID of
2: begin
DoQuit;
Result:= S_OK;
end;
end
end;
// DoQuit
//
procedure TEventSink.DoQuit;
begin
if not Assigned (Quit) then Exit;
Quit (Self);
end;
// Create
//
constructor TEventSink.Create;
begin
FSinkIID := IApplicationEvents;
end;
// Connect
//
procedure TEventSink.Connect (pSource : IUnknown);
var
pcpc : IConnectionPointContainer;
begin
Assert (pSource <> NIL);
Disconnect;
try
OleCheck (pSource.QueryInterface (IConnectionPointContainer, pcpc));
OleCheck (pcpc.FindConnectionPoint (FSinkIID, FCP));
OleCheck (FCP.Advise (Self, FCookie));
FSource := pSource;
except
raise Exception.Create (Format ('Unable to connect %s.'#13'%s',
['Word', Exception (ExceptObject).Message]
));
end;
end;
// Disconnect
//
procedure TEventSink.Disconnect;
begin
if (FSource = NIL) then Exit;
try
OleCheck (FCP.Unadvise(FCookie));
FCP := NIL;
FSource := NIL;
except
pointer (FCP) := NIL;
pointer (FSource) := NIL;
end;
end;
// _AddRef
//
function TEventSink._AddRef: Integer;
begin
Result := 2;
end;
// _Release
//
function TEventSink._Release: Integer;
begin
Result := 1;
end;
end.
メイン プログラムで、オブジェクト eventSink と Exit 関数のメソッドを追加し、オブジェクト EventSink を Word アプリケーションの ole バリアントに接続して、終了用の関数を登録します。
unit Unit1;
interface
uses
Windows, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls,
ExtCtrls, ComObj, Variants, UEventsSink;
type
TForm1 = class(TForm)
Button1: TButton;
Memo1: TMemo;
procedure Button1Click(Sender: TObject);
procedure ApplicationEventsQuit(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
private
FEventSink : TEventSink;
FWordApp : OleVariant;
public
end;
var
Form1: TForm1;
implementation
{$R *.DFM}
procedure TForm1.FormCreate(Sender: TObject);
begin
FEventSink := TEventSink.Create;
end;
procedure TForm1.FormDestroy(Sender: TObject);
begin
FEventSink.Disconnect;
FEventSink.Free;
end;
procedure TForm1.ApplicationEventsQuit(Sender: TObject);
begin
FEventSink.Disconnect;
Memo1.Lines.Add ('Application.Quit');
FWordApp := unassigned;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
try
// instantiate Word
FWordApp := CreateOleObject('Word.Application.14');
// connect Application events
FEventSink.Connect(FWordApp);
FEventSink.Quit := ApplicationEventsQuit;
// show Word
FWordApp.Visible := TRUE;
except
ShowMessage ('Unable to establish connection with Word !');
FWordApp := unassigned;
end;
end;
end.