User's Manual

6 Scanner Support—Chapter
149700 Series Color Mobile Computer User’s Manual
Create and Delete ADC COM Object Functions
Use these functions to create and release ADC COM interfaces.
ITCDEVMGMT.H is the header file and ITCDEVMGMT.LIB is the
library.
ITCDeviceOpen
This function opens and initializes a communication channel to the de-
vice. In C++, this function returns a pointer to an interface on which the
methods are called. In C, this function returns a handle, which is the first
parameter in each of the interface function calls.
Syntax
HRESULT ITCDeviceOpen( LPCTSTR pszDeviceName, REFIID iid,
ITC_DEVICE_FLAGS eDeviceFlags, void** ppvObject );
Parameters
pszDevice [in] Pointer to a string that contains the device name
on which to initialize the logical connection.
The device name (Merlin 1) identifies a
communications port.
Use “default” for all internal scanners, such as
Imager, SE900, etc. Use “ExtScanner” for
tethered scanners.
iid [in] The identifier of the interface being requested.
eDeviceFlags [in] Enumeration that identifies the read
characteristics as follows:
S ITC_DHDEVFLAG_READAHEAD
Data is buffered on behalf of the calling
applications. Data Buffering starts after the
first call to IADC::Read ().
S ITC_DHDEVFLAG_NODATA
The client application is managing the device
to set its configuration or control its interface
but not to collect data from the device.
ppvObject [out] A pointer to the interface pointer identified by
iid. If the object does not support this interface,
ppvObject is set to NULL.
Return Values
HRESULT that indicates success or failure.
Remarks
None.
See Also
S ITCDeviceClose