Help Version 19.0.2017.10.27
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#include "ltwrappr.h"
virtual L_TCHAR * LWia::GetSelectedDevice()
Gets a string pointer that contains the ID for currently selected device.
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 get a string that represents the ID for the currently selected device.
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.
Note that if you are using the LWia::AcquireSimple function to automatically acquire from your device then it is not necessary to call either of the two mentioned functions above before calling the LWia::GetSelectedDevice (LWia::AcquireSimple function internally calls the LWia::SelectDeviceDlg function and this will assure you have a device currently selected).
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::SelectDevice, LWia::GetSelectedDeviceType, LWia::SelectDeviceDlg, LWia::AcquireSimple, LWia::InitSession, LWia::EndSession, Class Members |
Topics: |
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For an example, refer to LWia::EnumDevices.