Help Version 19.0.2017.10.27
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#include "ltwia.h"
L_LTWIA_API L_INT EXT_FUNCTION L_WiaGetSelectedDeviceType(hSession, puDeviceType)
HWIASESSION hSession; |
handle to an existing WIA session |
L_UINT32 * puDeviceType; |
pointer to variable of type L_UINT to receive the selected device type |
Gets the currently selected device type.
| Parameter | Description | |
| hSession | Handle to an existing WIA session. This handle is obtained by calling the L_WiaInitSession function. | |
| puDeviceType | The type if the currently selected device. 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 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 L_WiaSelectDeviceDlg or L_WiaSelectDevice 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. |
Platforms
LEADTOOLS WIA supports both 32-bit and 64-bit image acquisition for both WIA 1.0 (XP and earlier) and WIA 2.0 (VISTA and later).
Functions: |
L_WiaGetSelectedDevice, L_WiaSelectDevice, L_WiaSelectDeviceDlg, L_WiaAcquireSimple, L_WiaInitSession, L_WiaEndSession. |
Topics: |
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For an example, refer to L_WiaEnumDevices.