截取视频的时候，可不可以不要直接保存成文件，到传到Image中(100分)

读了《delphi编程控制摄像头》一文，源程序如下：

unit Unit1;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, ExtCtrls;

type
TForm1 = class(TForm)
Panel1: TPanel;
Button1: TButton;
Button2: TButton;
Button3: TButton;
Button4: TButton;
Button5: TButton;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button3Click(Sender: TObject);
procedure Button4Click(Sender: TObject);
procedure Button5Click(Sender: TObject);
procedure FormClose(Sender: TObject;
var Action: TCloseAction);
private
hWndC : THandle;
public
{ Public declarations }
end;


var
Form1: TForm1;


const WM_CAP_START = WM_USER;
const WM_CAP_STOP = WM_CAP_START + 68;
const WM_CAP_DRIVER_CONNECT = WM_CAP_START + 10;
const WM_CAP_DRIVER_DISCONNECT = WM_CAP_START + 11;
const WM_CAP_SAVEDIB = WM_CAP_START + 25;
const WM_CAP_GRAB_FRAME = WM_CAP_START + 60;
const WM_CAP_SEQUENCE = WM_CAP_START + 62;
const WM_CAP_FILE_SET_CAPTURE_FILEA = WM_CAP_START + 20;
const WM_CAP_SEQUENCE_NOFILE =WM_CAP_START+ 63
const WM_CAP_SET_OVERLAY =WM_CAP_START+ 51
const WM_CAP_SET_PREVIEW =WM_CAP_START+ 50
const WM_CAP_SET_CALLBACK_VIDEOSTREAM = WM_CAP_START +6;
const WM_CAP_SET_CALLBACK_ERROR=WM_CAP_START +2;
const WM_CAP_SET_CALLBACK_STATUSA= WM_CAP_START +3;
const WM_CAP_SET_CALLBACK_FRAME= WM_CAP_START +5;
const WM_CAP_SET_SCALE=WM_CAP_START+ 53
const WM_CAP_SET_PREVIEWRATE=WM_CAP_START+ 52

function capCreateCaptureWindowA(lpszWindowName : PCHAR;
dwStyle : longint;x : integer;y : integer;nWidth : integer;
nHeight : integer;ParentWin : HWND;nId : integer): HWND;
STDCALL EXTERNAL ‘AVICAP32.DLL‘;


implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin

hWndC := capCreateCaptureWindowA(‘My Own Capture Window‘,WS_CHILD or WS_VISIBLE ,Panel1.Left,Panel1.Top,Panel1.Width,Panel1.Height,Form1.Handle,0);

hWndC := capCreateCaptureWindowA(‘My Own Capture Window‘,WS_CHILD or WS_VISIBLE ,Panel1.Left,Panel1.Top,Panel1.Width,Panel1.Height,Form1.Handle,0);
if hWndC <> 0 then

begin

SendMessage(hWndC, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);
SendMessage(hWndC, WM_CAP_SET_CALLBACK_ERROR, 0, 0);
SendMessage(hWndC, WM_CAP_SET_CALLBACK_STATUSA, 0, 0);
SendMessage(hWndC, WM_CAP_DRIVER_CONNECT, 0, 0);
SendMessage(hWndC, WM_CAP_SET_SCALE, 1, 0);
SendMessage(hWndC, WM_CAP_SET_PREVIEWRATE, 66, 0);
SendMessage(hWndC, WM_CAP_SET_OVERLAY, 1, 0);
SendMessage(hWndC, WM_CAP_SET_PREVIEW, 1, 0);
end;


end;


procedure TForm1.Button2Click(Sender: TObject);
begin

if hWndC <> 0 then
begin

SendMessage(hWndC, WM_CAP_DRIVER_DISCONNECT, 0, 0);
hWndC := 0;
end;

end;


procedure TForm1.Button3Click(Sender: TObject);
begin

if hWndC <> 0 then
begin

SendMessage(hWndC,WM_CAP_SAVEDIB,0,longint(pchar(‘c://test.bmp‘)));
end;

end;


procedure TForm1.Button4Click(Sender: TObject);
begin

if hWndC <> 0 then

begin

SendMessage(hWndC,WM_CAP_FILE_SET_CAPTURE_FILEA,0, Longint(pchar(‘c://test.avi‘)));
SendMessage(hWndC, WM_CAP_SEQUENCE, 0, 0);
end;

end;


procedure TForm1.Button5Click(Sender: TObject);
begin

if hWndC <> 0 then
begin

SendMessage(hWndC, WM_CAP_STOP, 0, 0);
end;

end;


procedure TForm1.FormClose(Sender: TObject;
var Action: TCloseAction);
begin

if hWndC <> 0 then
begin

SendMessage(hWndC, WM_CAP_DRIVER_DISCONNECT, 0, 0);
end;

end;


end.





其中：
SendMessage(hWndC,WM_CAP_SAVEDIB,0,longint(pchar(‘c://test.bmp‘)));
能不能不保存文件，到传到Image中去。。

我现在的作法是：
SendMessage(hWndC,WM_CAP_SAVEDIB,0,longint(pchar(‘c://test.bmp‘)));
image1.picture.loadfromfile('c://test.bmp')

这样会产生一个多余的文件，请问下有解决办法吗，谢谢