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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| No
| Import Library
| kernel32.lib
| Header File
| winbase.h
| Unicode
| WinNT
| Platform Notes
| None
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BuildCommDCBAndTimeouts
The BuildCommDCBAndTimeouts function translates a device-definition string into appropriate
device-control block codes and then places these codes into a device control block. The
function can also set up time-out values, including the possibility of no
time-outs, for a device; the function's behavior in this regard varies based on the
contents of the device-definition string.
BOOL BuildCommDCBAndTimeouts(
LPCTSTR lpDef,
| // pointer to the device-control string
| LPDCB lpDCB,
| // pointer to the device-control block
| LPCOMMTIMEOUTS lpCommTimeouts
| // pointer to comm. time-out structure
| );
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Parameters
lpDef
Pointer to a null-terminated string that specifies device-control information
for the device. The function takes this string, parses it, and then sets
appropriate values in the DCB structure pointed to by lpDCB.
lpDCB
Pointer to a DCB structure that the function fills with information from the device-control
information string pointed to by lpDef. This DCB structure defines the control settings for a communications device.
lpCommTimeouts
Pointer to a COMMTIMEOUTS structure that the function can use to set device time-out values.
The BuildCommDcbAndTimeouts function modifies its time-out setting behavior based on the presence or
absence of a "TO=xxx" substring in the string specified by lpDef:
- If that string contains the substring "TO=ON", the function sets up total read
and write time-out values for the device based on the time-out structure
pointed to by lpCommTimeouts.
- If that string contains the substring "TO=OFF", the function sets up the
device with no time-outs.
- If that string contains neither of the aforementioned "TO=xxx" substrings, the
function ignores the time-out structure pointed to by lpCommTimeouts. The time-out structure will not be accessed.
Return Values
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error
information, call GetLastError.
See Also
BuildCommDCB, COMMTIMEOUTS, DCB, GetCommTimeouts, SetCommTimeouts
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