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IOCTL_SERIAL_IMMEDIATE_CHAR (Windows Embedded CE 6.0)

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1/6/2010

This IOCTL transmits a specified character ahead of any pending data in the output buffer of a communications device. The DeviceIoControl function executes this IOCTL.

Parameters

  • dwOpenData
    [in] Handle returned from a call to the COM_Open function.
  • dwCode
    [in] Set to this IOCTL: IOCTL_SERIAL_IMMEDIATE_CHAR.
  • pBufIn
    [in] Pointer to a UCHAR variable to send.
  • dwLenIn
    [in] Set to sizeof(UCHAR).
  • pBufOut
    Ignored.
  • dwLenOut
    Ignored.
  • pdwActualOut
    Ignored.

Return Values

Returns TRUE if successful. Returns FALSE otherwise. To obtain extended error information, call GetLastError.

Requirements

Header pegdser.h
Windows Embedded CE Windows CE 1.0 and later

See Also

Reference

Serial Port Driver IOCTLs
COM_IOControl
COM_Open
DeviceIoControl