camara webcam desde vfp

[Saul Piña Hernandez]

Saludos, logré ejecutar la camara web de un windows 8.1 64 bits pero quisiera que no apareciera el fondo de la pantalla principal de vfp.

Como podría quitarla? 

el codigo es el siguiente:

LPARAMETERS parameter1
PUBLIC lc1
lc1=parameter1

LOCAL oForm
oForm = CREATEOBJECT("Tform")
oForm.Show(1)
* end of main

DEFINE CLASS Tform As Form
#DEFINE WM_CAP_START 0x0400
#DEFINE WM_CAP_DRIVER_CONNECT (WM_CAP_START+10)
#DEFINE WM_CAP_DRIVER_DISCONNECT (WM_CAP_START+11)
#DEFINE WM_CAP_DRIVER_GET_CAPS (WM_CAP_START+14)
#DEFINE WM_CAP_SET_PREVIEW (WM_CAP_START+50)
#DEFINE WM_CAP_SET_OVERLAY (WM_CAP_START+51)
#DEFINE WM_CAP_SET_PREVIEWRATE (WM_CAP_START+52)
#DEFINE WM_CAP_GET_STATUS (WM_CAP_START+54)
#DEFINE WM_CAP_GRAB_FRAME (WM_CAP_START+60)

_screen.Visible=.f.


    Width=340
    Height=315
    Autocenter=.T.
    Caption="Capturador de Fotos"
    MinButton=.F.
    MaxButton=.F.
    ShowTips=.t.
    ShowWindow=1
    WindowType=1
    Icon="sun.ico"
    hWindow=0
    hCapture=0
    capWidth=0
    capHeight=0
    capOverlay=0

   
    ADD OBJECT cmdGetFrame As CommandButton WITH Default=.T.,;
    Left=10, Top=268, Height=33, Width=95, Caption="Obtener \<Foto",;
    Enabled=.F., Fontbold=.t., ToolTipText="Capturar la Foto a Ser Guardada"

    ADD OBJECT cmdPreview As CommandButton WITH Default=.T.,;
    Left=115, Top=268, Height=33, Width=95, Caption="\<Prep. Camara",;
    Enabled=.F., Fontbold=.t., ToolTipText="Preparar y Ajustar la Camara para la Foto"


    ADD OBJECT cmdClose As CommandButton WITH Cancel=.T.,;
    Left=236, Top=268, Height=33, Width=95, Caption="\<Salir",;
    Fontbold=.t., ToolTipText="Salir de la Pantalla"


PROCEDURE Activate
    IF THIS.hWindow = 0
        DECLARE INTEGER GetFocus IN user32
        THIS.hWindow = GetFocus()
        THIS.CreateCaptureWindow
        THIS.DriverConnect   
    ENDIF

PROCEDURE Destroy
    THIS.ReleaseCaptureWindow

PROCEDURE cmdClose.Click
    ThisForm.Release

PROCEDURE cmdGetFrame.Click
    ThisForm.GetFrame

PROCEDURE cmdPreview.Click
    ThisForm.StartPreview

PROCEDURE GetFrame
    THIS.msg(WM_CAP_GRAB_FRAME, 0,0)   
    #DEFINE WM_CAP_FILE_SAVEDIB (WM_CAP_START + 25)

    LOCAL lcFile, nopcion
    nopcion="fotoact"
    lcFile = "" && File name to create   
    lcFile = "C:\sistemait\fotos_clientes\"+ALLTRIM(lc1)+".bmp"

    THIS.msg(WM_CAP_GRAB_FRAME, 0,0)
    THIS.msg(WM_CAP_FILE_SAVEDIB, 0, lcFile,1)
    lcMess = "Guardando la Fotografia, Fotografia "+ALLTRIM(lc1)+".bmp Guardada !!!..."
    Wait lcMess Window At Srows()/2,(Scols()/2 - (Len(lcMess)/2))Nowait   
   
    *USE C:\sistemait\datos\clientes.dbf IN 0 SHARED
    *SELECT clientes
   
   
PROCEDURE CreateCaptureWindow
#DEFINE WS_CHILD 0x40000000
#DEFINE WS_VISIBLE 0x10000000

    DECLARE INTEGER capCreateCaptureWindow IN avicap32;
        STRING lpszWindowName, LONG dwStyle,;
        INTEGER x, INTEGER y,;
        INTEGER nWidth, INTEGER nHeight,;
        INTEGER hParent, INTEGER nID

    THIS.hCapture = capCreateCaptureWindow("",;
        WS_CHILD+WS_VISIBLE,;
        10,8,320,240, THIS.hWindow, 1)

PROCEDURE DriverConnect
    THIS.msg(WM_CAP_DRIVER_CONNECT, 0,0)
    IF THIS.IsCaptureConnected()
        THIS.GetCaptureDimensions
        STORE .T. TO THIS.cmdGetFrame.Enabled,;
            THIS.cmdPreview.Enabled
        THIS.Caption = THIS.Caption + ": conectada, " +;
            LTRIM(STR(THIS.capWidth)) + "x" +;
            LTRIM(STR(THIS.capHeight))
    ELSE
        THIS.Caption = THIS.Caption + ": Fallo al Conectar Camara"
    ENDIF

PROCEDURE DriverDisconnect
    THIS.msg(WM_CAP_DRIVER_DISCONNECT, 0,0)
   
PROCEDURE ReleaseCaptureWindow
    IF THIS.hCapture <> 0
        THIS.DriverDisconnect
        DECLARE INTEGER DestroyWindow IN user32 INTEGER hWnd
        = DestroyWindow(THIS.hCapture)
        THIS.hCapture = 0
    ENDIF

PROCEDURE msg(msg, wParam, lParam, nMode)
    IF THIS.hCapture = 0
        RETURN
    ENDIF

    IF VARTYPE(nMode) <> "N" Or nMode=0
        DECLARE INTEGER SendMessage IN user32;
            INTEGER hWnd, INTEGER Msg,;
            INTEGER wParam, INTEGER lParam
        = SendMessage(THIS.hCapture, msg, wParam, lParam)
    ELSE
        DECLARE INTEGER SendMessage IN user32;
            INTEGER hWnd, INTEGER Msg,;
            INTEGER wParam, STRING @lParam
        = SendMessage(THIS.hCapture, msg, wParam, @lParam)
    ENDIF

FUNCTION IsCaptureConnected
* analyzing fCaptureInitialized member of the CAPDRIVERCAPS structure
#DEFINE CAPDRIVERCAPS_SIZE 44
    LOCAL cBuffer, nResult
    cBuffer = Repli(Chr(0),CAPDRIVERCAPS_SIZE)
    THIS.msg(WM_CAP_DRIVER_GET_CAPS, Len(cBuffer), @cBuffer, 1)
    THIS.capOverlay = buf2dword(SUBSTR(cBuffer,5,4))
    nResult = Asc(SUBSTR(cBuffer, 21,1))
RETURN (nResult<>0)

PROCEDURE GetCaptureDimensions
* reading uiImageWidth and uiImageHeight members
* of the CAPSTATUS structure
#DEFINE CAPSTATUS_SIZE 76
    LOCAL cBuffer
    cBuffer = Repli(Chr(0), CAPSTATUS_SIZE)
    THIS.msg(WM_CAP_GET_STATUS, Len(cBuffer), @cBuffer, 1)
    THIS.capWidth = buf2dword(SUBSTR(cBuffer,1,4))
    THIS.capHeight = buf2dword(SUBSTR(cBuffer,5,4))
   
PROCEDURE StartPreview
    THIS.msg(WM_CAP_SET_PREVIEWRATE, 30,0)
    THIS.msg(WM_CAP_SET_PREVIEW, 1,0)
    IF THIS.capOverlay <> 0
        THIS.msg(WM_CAP_SET_OVERLAY, 1,0)
    ENDIF

PROCEDURE StopPreview
    THIS.msg(WM_CAP_SET_PREVIEW, 0,0)
ENDDEFINE

FUNCTION buf2dword(lcBuffer)
RETURN Asc(SUBSTR(lcBuffer, 1,1)) + ;
    BitLShift(Asc(SUBSTR(lcBuffer, 2,1)), 8) +;
    BitLShift(Asc(SUBSTR(lcBuffer, 3,1)), 16) +;
    BitLShift(Asc(SUBSTR(lcBuffer, 4,1)), 24)


*By implementing the code below into the getframe method
*the captured frame will save to a bmp file when the getframe
*button is clicked.

#DEFINE WM_CAP_FILE_SAVEDIB (WM_CAP_START + 25)

LOCAL lcFile
lcFile = "" && File name to create
lcFile = "sample.bmp"

THIS.msg(WM_CAP_GRAB_FRAME, 0,0)
THIS.msg(WM_CAP_FILE_SAVEDIB, 0, lcFile,1)

desde ya muy agradecido.