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IOCTL_SERIAL_CLR_DTR (Windows Embedded CE 6.0)

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1/6/2010

This IOCTL sets the Data Terminal Ready (DTR) signal to low. It is used by the COM_IOControl function. 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_CLR_DTR.
  • pBufIn
    Ignored.
  • dwLenIn
    Ignored.
  • pBufOut
    Ignored.
  • dwLenOut
    Ignored.
  • pdwActualOut
    Ignored.

Return Values

Returns TRUE if successful. Returns FALSE otherwise. To get 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
IOCTL_SERIAL_SET_DTR