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Gets the currently selected device type.
#include "ltwia.h"
L_LTWIA_API L_INT EXT_FUNCTION L_WiaGetSelectedDeviceType(hSession, puDeviceType)
Handle to an existing WIA session. This handle is obtained by calling the L_WiaInitSession function.
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. |
| Value | Meaning |
|---|---|
| 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.
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).
For an example, refer to L_WiaEnumDevices.