Help Version 19.0.2017.10.27
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#include "ltwrappr.h"
virtual L_INT LWia::GetSelectedDeviceType(puDeviceType)
L_UINT32 * puDeviceType; |
pointer to variable of type L_UINT to receive the selected device type |
Gets the currently selected device type.
| Parameter | Description | |
| puDeviceType | The type of the device that is currently connected. Possible values are: | |
| Value | Meaning | |
| WiaDeviceTypeScanner | The device is a scanner. | |
| WiaDeviceTypeDigitalCamera | The device is a camera. Cameras are not supported by Windows Vista and later. | |
| WiaDeviceTypeStreamingVideo | The device contains streaming video. Streaming video is not supported by Windows Server 2003, Windows Vista, or later. | |
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
This feature is available in LEADTOOLS version 16 or higher.
Call this function to determine the currently selected device type.
WIA does not have a default device selection. In order for this function to succeed be sure to call either LWia::SelectDeviceDlg or LWia::SelectDevice before calling this function.
Required DLLs and Libraries
LTWIA For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
Functions: |
LWia::GetSelectedDevice, LWia::SelectDevice, LWia::SelectDeviceDlg, LWia::AcquireSimple, LWia::InitSession, LWia::EndSession, Class Members |
Topics: |
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For an example, refer to LWia::EnumDevices.