VintaSoftTwain Control v6.0
VintaSoftTwain Object / Device_GetImageLayout Method
Left (X) coordinate of image layout.
Top (Y) coordinate of image layout.
Right (X) coordinate of image layout.
Bottom (Y) coordinate of image layout.
In This Topic
    Device_GetImageLayout Method
    In This Topic
    Returns an image layout for current scan session.
    Visual Basic
    Public Function Device_GetImageLayout( _
       ByRef left As Single, _
       ByRef top As Single, _
       ByRef right As Single, _
       ByRef bottom As Single _
    ) As Boolean
    Left (X) coordinate of image layout.
    Top (Y) coordinate of image layout.
    Right (X) coordinate of image layout.
    Bottom (Y) coordinate of image layout.
    Return Type
    Current image layout rectangle.
    The image layout rectangle defines what portion of the device's scanning area will be acquired.

    Call this method only when device is opened (Device_State == enumDevice_State.DeviceOpened).

    This method has effect only if user interface is not shown (Device_ShowUI == False).
    This example shows how to get image layout before image scan.
    Private VSTwain1 As New VintaSoftTwain()
    ''' <summary>
    ''' Scans images asynchronously.
    ''' </summary>
    Private Sub ScanImages()
        ' open the device manager
        If Not VSTwain1.DeviceManager_Open() Then
            Exit Sub
        End If
        ' select device using standard device selection dialog
        ' open the device
        If Not VSTwain1.Device_Open Then
            Exit Sub
        End If
        ' set units of measure to inches
        VSTwain1.Device_UnitOfMeasure = UNITOFMEASURE.UNITOFMEASURE_Inches
        ' get the image layout
        Dim left, top, right, bottom As Single
        VSTwain1.Device_GetImageLayout(left, top, right, bottom)
        ' subscribe to the device events
        AddHandler VSTwain1.DeviceImageAcquired, AddressOf VSTwain1_ImageAcquired
        AddHandler VSTwain1.DeviceScanCompleted, AddressOf VSTwain1_ScanCompleted
        AddHandler VSTwain1.DeviceScanFailed, AddressOf VSTwain1_ScanFailed
        AddHandler VSTwain1.DeviceScanCanceled, AddressOf VSTwain1_ScanCanceled
        ' acquire images asynchronously
    End Sub
    Private Sub VSTwain1_ImageAcquired()
        ' get index of acquired image
        Dim imageIndex As Integer = VSTwain1.AcquiredImages_Count - 1
        ' save acquired image to TIFF file
        If Not VSTwain1.AcquiredImages_Save(imageIndex, "test.tif") Then
        End If
    End Sub
    Private Sub VSTwain1_ScanCompleted()
        Console.WriteLine("Scan is completed.")
    End Sub
    Private Sub VSTwain1_ScanFailed(errorString As String)
        Console.WriteLine(String.Format("Scan is failed: {0}.", errorString))
    End Sub
    Private Sub VSTwain1_ScanCanceled()
        Console.WriteLine("Scan is canceled.")
    End Sub
    See Also