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unit Unit1;

interface

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

type
    TForm1 = class(TForm)
      Panel1: TPanel;
      procedure FormCreate(Sender: TObject);
  private
      { Private-Deklarationen }
  public
      { Public-Deklarationen }
  end;

var
    Form1: TForm1;

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;

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 TForm1.Formcreate;
 var handle:THandle;
  begin
    handle := capCreateCaptureWindow('Video',ws_child+ws_visible, 0,
    0, 320, 240, Panel1.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);
  end;

end.



//orig von http://www.delphipraxis.net/post282535.html#282535