Foro de elhacker.net

'Declaraciones:
Const ws_visible = &H10000000
Const ws_child = &H40000000
Const WM_USER = 1024
Const WM_CAP_EDIT_COPY = WM_USER + 30
Const wm_cap_driver_connect = WM_USER + 10
Const wm_cap_set_preview = WM_USER + 50
Const wm_cap_set_overlay = WM_USER + 51
Const WM_CAP_SET_PREVIEWRATE = WM_USER + 52
Const WM_CAP_SEQUENCE = WM_USER + 62
Const WM_CAP_SINGLE_FRAME_OPEN = WM_USER + 70
Const WM_CAP_SINGLE_FRAME_CLOSE = WM_USER + 71
Const WM_CAP_SINGLE_FRAME = WM_USER + 72
Const DRV_USER = &H4000
Const DVM_DIALOG = DRV_USER + 100
Const PREVIEWRATE = 30

Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lparam As Long) As Long
Private Declare Function capCreateCaptureWindow Lib "avicap32.dll" Alias "capCreateCaptureWindowA" (ByVal a As String, ByVal b As Long, ByVal c As Integer, ByVal d As Integer, ByVal e As Integer, ByVal f As Integer, ByVal g As Long, ByVal h As Integer) As Long

Dim hwndc As Long
'Declaro la función GetPixel
Private Declare Function GetPixel Lib "gdi32" ( _
    ByVal hdc As Long, _
    ByVal X As Long, _
    ByVal Y As Long) As Long

Private Sub Command1_Click()
'Código que realiza la captura de la imagen:

temp = SendMessage(hwndc, WM_CAP_EDIT_COPY, 1, 0)
Set Picture1.Picture = Clipboard.GetData
'Guardo la imagen para ver las dimensiones
SavePicture Picture1.Picture, "c:\imagen.jpg"

End Sub


Private Sub Form_Load()
'Código que activa la captura de imágenesse supone un formulario con 2 picture llamados "picture1" y "picture2")

hwndc = capCreateCaptureWindow("Ventana de Captura", ws_child Or ws_visible, 0, 0, Picture2.Width, Picture2.Height, Picture2.hwnd, 0)
If (hwndc <> 0) Then
temp = SendMessage(hwndc, wm_cap_driver_connect, 0, 0)
temp = SendMessage(hwndc, wm_cap_set_preview, 1, 0)
temp = SendMessage(hwndc, WM_CAP_SET_PREVIEWRATE, PREVIEWRATE, 0)
End If


End Sub

Picture1.AutoRedraw = True
Picture1.PaintPicture Clipboard.GetData, 0, 0, Picture1.ScaleWidth, Picture1.ScaleHeight
Picture1.Refresh

SendMessage hWndCap, GET_FRAME, 0, 0
    SendMessage hWndCap, COPY, 0, 0
    SendMessage hWndCap, SET_SCALE, True, 0 'esto es lo que necesitas pero busca la api conrrespondiente o equivalente

Public Const WM_CAP_SET_SCALE = WM_USER + 53