IOCTL_SERIAL_CLR_DTR (Windows CE 5.0)

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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

OS Versions: Windows CE 1.0 and later.
Header: Pegdser.h.

See Also

COM_IOControl | COM_Open | DeviceIoControl | IOCTL_SERIAL_SET_DTR

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