User's Manual Part 1

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156 700 Series Color Mobile Computer User’s Manual

IADC::Read

This function requests user input data from the reader engine. This is a

blocking function that returns either when there is data or after a timeout.

Syntax

HRESULT IADC::Read ( BYTE rgbDataBuffer[], DWORD

dwDataBufferSize, DWORD pnBytesReturned, SYSTEMTIME

pSystemTime, DWORD dwTimeout );

Parameters

rgbDataBuffer [in] Pointer to the buffer that receives the data

from the device.

dwDataBufferSize [in] Maximum number of bytes that can be

stored in rgbDataBuffer.

pnBytesReturned [out] Pointer to the DWORD location to store

the number of bytes returned in

rgbDataBuffer.

pSystemTime [out] Pointer to a SYSTEMTIME structure that

will hold the time stamp of the received

data. This can be NULL if a timestamp is

not needed.

dwTimeout [in] Number of milliseconds caller waits for

data. This parameter is ignored if the

Read Ahead flag is not set.

S 0

If data is not available, returns quickly.

S INFINITE

Waits until data is available.

Return Values

HRESULT that indicates success or failure.

Remarks

None.