LEADTOOLS WIA (Leadtools.Wia assembly)
LEAD Technologies, Inc

SelectDeviceDlg Method






Window handle of your application window.
Specifies which type of WIA device to use. Possible values are:

Value

Meaning

WiaDeviceType.Default Generic WIA device. During device enumerations, this constant is used to enumerate all WIA devices. This is the default value.
WiaDeviceType.Scanner The device is a scanner.
WiaDeviceType.DigitalCamera The device is a camera. Note that this type of device is not supported by Windows Vista and later.
WiaDeviceType.StreamingVideo The device contains streaming video. Note that this type of device is not supported by Windows Server 2003, Windows Vista, or later.
Flag that determines certain actions of the WIA image acquisition selection dialog box. Possible values are:

Value

Meaning

WiaSelectSourceFlags.None Default behavior for the device image acquisition dialog box.
WiaSelectSourceFlags.NoDefault Display the dialog box even if there is only one matching device.
Displays a dialog box that enables the user to select a WIA hardware device for image acquisition.
Syntax
public DialogResult SelectDeviceDlg( 
   IWin32Window owner,
   WiaDeviceType deviceType,
   WiaSelectSourceFlags flags
)
'Declaration
 
Public Function SelectDeviceDlg( _
   ByVal owner As IWin32Window, _
   ByVal deviceType As WiaDeviceType, _
   ByVal flags As WiaSelectSourceFlags _
) As DialogResult
'Usage
 
Dim instance As WiaSession
Dim owner As IWin32Window
Dim deviceType As WiaDeviceType
Dim flags As WiaSelectSourceFlags
Dim value As DialogResult
 
value = instance.SelectDeviceDlg(owner, deviceType, flags)
public DialogResult SelectDeviceDlg( 
   IWin32Window owner,
   WiaDeviceType deviceType,
   WiaSelectSourceFlags flags
)
 function Leadtools.Wia.WiaSession.SelectDeviceDlg( 
   owner ,
   deviceType ,
   flags 
)
public:
DialogResult SelectDeviceDlg( 
   IWin32Window^ owner,
   WiaDeviceType deviceType,
   WiaSelectSourceFlags flags
) 

Parameters

owner
Window handle of your application window.
deviceType
Specifies which type of WIA device to use. Possible values are:

Value

Meaning

WiaDeviceType.Default Generic WIA device. During device enumerations, this constant is used to enumerate all WIA devices. This is the default value.
WiaDeviceType.Scanner The device is a scanner.
WiaDeviceType.DigitalCamera The device is a camera. Note that this type of device is not supported by Windows Vista and later.
WiaDeviceType.StreamingVideo The device contains streaming video. Note that this type of device is not supported by Windows Server 2003, Windows Vista, or later.
flags
Flag that determines certain actions of the WIA image acquisition selection dialog box. Possible values are:

Value

Meaning

WiaSelectSourceFlags.None Default behavior for the device image acquisition dialog box.
WiaSelectSourceFlags.NoDefault Display the dialog box even if there is only one matching device.

Return Value

One of the DialogResult values. If an error occurs, an exception is thrown.
Remarks

This function creates and displays the Select Device dialog box so the user can select a WIA device for image acquisition.

Particular types of devices may be displayed to the user by specifying the device types through the deviceType parameter.

If only one device meets the specification, the SelectDeviceDlg does not display the Select Device dialog box. Override this behavior and force the SelectDeviceDlg to display the Select Device dialog box by passing NoDefault as the value for the flags parameter.

Note:

WIA 2.0 does not support cameras or streaming video.

Note:

You do not need to call this method if you are using the high-level AcquireSimple method, since it handles session initialization, session end, and device selection automatically.

For more information, refer to How to Acquire from the WIA Source.

For more information, refer to Managing WIA Sources.

Example
Refer to WiaSession.IsAvailable.
Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also

Reference

WiaSession Class
WiaSession Members
Startup Method
Shutdown Method
SelectDevice Method
GetSelectedDevice Method
SelectedDeviceType Property
Acquire Method
AcquireToFile Method
AcquireSimple Method

 

 


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