unit Unit4;

interface

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

  const
  WM_CAP_DRIVER_CONNECT = WM_USER + 10;
  WM_CAP_EDIT_COPY = WM_USER + 30;
  WM_CAP_SET_PREVIEW = WM_USER + 50;
  WM_CAP_SET_OVERLAY = WM_USER + 51;
  WM_CAP_SET_PREVIEWRATE = WM_USER + 52;
  WM_CAP_FILE_SAVEDIB = WM_USER + 25;

type
  TForm4 = class(TForm)
    procedure FormCreate(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form4: TForm4;

implementation

{$R *.dfm}


function capCreateCaptureWindow(lpszWindowName: LPCSTR;
  dwStyle: DWORD;
  x, y,
  nWidth,
  nHeight: integer;
  hwndParent: HWND;
  nID: integer): HWND; stdcall;
  external 'AVICAP32.DLL' name 'capCreateCaptureWindowA';


procedure TForm4.FormCreate(Sender: TObject);
var handle:THandle;
begin
  handle := capCreateCaptureWindow('Video',ws_child+ws_visible, 0,
  0, 320, 240, Form4.Handle, 1);
  SendMessage(handle, WM_CAP_DRIVER_CONNECT, 0, 0);
  SendMessage(handle, WM_CAP_SET_PREVIEWRATE, 30, 0);
  sendMessage(handle, WM_CAP_SET_OVERLAY, 1, 0);
  SendMessage(handle, wm_cap_set_preview, 1, 0);
  SendMessage(handle, WM_CAP_FILE_SAVEDIB, 0, LPARAM(Pchar('C:/file.jpg')));
end;

end.