Important: |
---|
This is retired content. This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This content may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist. |
This structure contains communication device data.
This structure is filled by the ClearCommErrorfunction.
Syntax
typedef struct _COMSTAT { DWORD fCtsHold :1; DWORD fDsrHold :1; DWORD fRlsdHold :1; DWORD fXoffHold :1; DWORD fXoffSent :1; DWORD fEof :1; DWORD fTxim :1; DWORD fReserved :25; DWORD cbInQue; DWORD cbOutQue; } COMSTAT, *LPCOMSTAT; |
Members
- fCtsHold
-
Specifies if the transmission is waiting to receive the clear-to-send (CTS) signal. If this member is set to TRUE, the transmission is waiting.
- fDsrHold
-
Specifies if the transmission is waiting to receive the data-set-ready (DSR) signal. If this member is set to TRUE, the transmission is waiting.
- fRlsdHold
-
Specifies whether the transmission is waiting to receive the receive-line-signal-detect (RLSD) signal. If this member is set to TRUE, the transmission is waiting.
- fXoffHold
-
Specifies whether the transmission is waiting because the XOFF character was received. If this member is set to TRUE, the transmission is waiting.
- fXoffSent
-
Specifies whether the transmission is waiting because the XOFF character was transmitted. If this member is set to TRUE, the transmission is waiting.
Transmission stops when the XOFF character is transmitted to a system that takes the next character as XON, regardless of the actual character.
- fEof
-
Specifies whether the end-of-file (EOF) character has been received. If this member is set to TRUE, the EOF character has been received.
- fTxim
-
If this member is set to TRUE, a character queued for transmission has come to the communication device from the TransmitCommCharfunction. The communication device transmits such a character ahead of other characters in the device's output buffer.
- fReserved
-
Reserved; do not use.
- cbInQue
-
Specifies the number of bytes received by the serial provider, but not yet read by ReadFile.
- cbOutQue
-
Specifies the number of bytes of user data remaining to be transmitted for all write operations.
Requirements
Header | winbase.h |
Windows Embedded CE | Windows CE 1.0 and later |
Windows Mobile | Windows Mobile Version 5.0 and later |