TwainSelectSource(IntPtr) Method

In This Topic

Displays the Source Manager's Select Source dialog box to enable selecting the TWAIN device for further usage. This dialog lists all available installed devices and allows the user to select the default one for next use.

Syntax

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

'Declaration
 
Public Overloads Function TwainSelectSource( _
   ByVal HANDLE As IntPtr _
) As Boolean

public bool TwainSelectSource( 
   IntPtr HANDLE
)

public function TwainSelectSource( 
    HANDLE: IntPtr
): Boolean;

public function TwainSelectSource( 
   HANDLE : IntPtr
) : boolean;

public: bool TwainSelectSource( 
   IntPtr HANDLE
)

public:
bool TwainSelectSource( 
   IntPtr HANDLE
)

Parameters

HANDLE: A window handle, that will act as the Source's parent, means Me.Handle or this.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

true if the method has been followed successfully, otherwise false. You can use the GdPictureImaging.TwainGetLastResultCode and the GdPictureImaging.TwainGetLastConditionCode methods to determine the reason for the method's failure.

Here are possible reasons for returning false:

The user canceled the Select Source dialog.
The Source Manager found no data sources installed.
There was a failure before the Select Source dialog could display.

Remarks

Please note that to open the selected device you need to use the GdPictureImaging.TwainOpenDefaultSource method.

Reference

GdPictureImaging Class
GdPictureImaging Members
Overload List
TwainGetState Method
TwainOpenDefaultSource(IntPtr) Method
TwainGetCurrentSourceName(IntPtr) Method
TwainGetLastResultCode Method
TwainGetLastConditionCode Method
TwainCloseSource Method