Microsoft Windows CE 3.0  


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This function returns the maximum number of bytes that the hardware buffer can hold, not counting the padding, stop, and start bits.

ULONG HWGetRxBufferSize(


Pointer to a context structure returned by the HWInitfunction that contains implementation-specific data describing the hardware device.

Return Values

Returns the number of bytes in the hardware receive queue.


This function supports the implementation of the PDDs of serial port drivers. The serial port driver's MDD layer ensures that the RX holding buffer is large enough to store at least one full HW Buffer worth of data, and provides additional room required to allow flow control.


Runs on Versions Defined in Include Link to
Windows CE OS 1.0 and later Serhw.h    
Note   This API is part of the complete Windows CE OS package as provided by Microsoft. The functionality of a particular platform is determined by the original equipment manufacturer (OEM) and some devices may not support this API.

See Also


 Last updated on Tuesday, July 13, 2004

© 2004 Microsoft Corporation. All rights reserved.