TwainAcquireToMemoryFile(String,IntPtr) Method

In This Topic

Acquires a single image, from the currently selected Data Source to a file. This method uses the memory transfer mode. This method is ideal to reach the best transfer rate of the acquisition device. The output image compression should be negotiated with the TwainSetCompression() method.

Syntax

Visual Basic
C#
Delphi
JScript
Managed Extensions for C++
C++/CLI

'Declaration
 
Public Overloads Function TwainAcquireToMemoryFile( _
   ByVal FilePath As String, _
   ByVal HANDLE As IntPtr _
) As GdPictureStatus

public GdPictureStatus TwainAcquireToMemoryFile( 
   string FilePath,
   IntPtr HANDLE
)

public function TwainAcquireToMemoryFile( 
    FilePath: String;
    HANDLE: IntPtr
): GdPictureStatus;

public function TwainAcquireToMemoryFile( 
   FilePath : String,
   HANDLE : IntPtr
) : GdPictureStatus;

public: GdPictureStatus TwainAcquireToMemoryFile( 
   string* FilePath,
   IntPtr HANDLE
)

public:
GdPictureStatus TwainAcquireToMemoryFile( 
   String^ FilePath,
   IntPtr HANDLE
)

Parameters

FilePath: The path of the image file to create.
HANDLE: A Window Handle IE: Me.Handle. In most applications you can use nothing but on Citrix and WTS, this must be a top-level window or a child of a top level window.

Return Value

A member of the GdPictureStatus enumeration.

Remarks

By default, the default data source (DS) is opened, displays its dialog, and determines all the parameters of the acquisition and transfer. If you want to (try to) hide the DS dialog, see TwainSetHideUI. Before using this method check that the TWAIN state is >= 4 (TWAIN_SOURCE_OPEN) To get the TWAIN state, use the TwainGetState() method. To set the TWAIN state to 4, use the TwainOpenDefaultSource() or TwainOpenSource() method. Warning: To works, this method requires that the current Data source allows memory transfer mode. Use the TwainIsMemoryTransferModeAvailable() to check if the source support this mode of transfer.

This method requires the Document Capture (TWAIN / WIA) component to run.

Reference

GdPictureImaging Class
GdPictureImaging Members
Overload List
TwainGetState Method
TwainLastXferFail Method
TwainUserClosedSource Method
TwainSetHideUI Method
TwainOpenDefaultSource(Int32) Method
TwainSetCompression Method
TwainIsMemoryTransferModeAvailable Method