IOCTL_SERIAL_GET_MODEMSTATUS (Windows Embedded CE 6.0)

1/6/2010

This IOCTL retrieves the current modem control-register values. 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_GET_MODEMSTATUS.

• pBufIn
  Ignored.

• dwLenIn
  Ignored.

• pBufOut
  [out] Pointer to a DWORD variable for the returned modem status information.

• dwLenOut
  [out] Greater than or equal to sizeof(DWORD).

• pdwActualOut
  [out] Pointer to a DWORD variable to return the length of returned data. If there is no error, set to sizeof(DWORD).

Return Values

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

Requirements

See Also

Reference

Serial Port Driver IOCTLs
COM_Open
DeviceIoControl