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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
| No
| Platform Notes
| None
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GetMailslotInfo
The GetMailslotInfo function retrieves information about the specified mailslot.
BOOL GetMailslotInfo(
HANDLE hMailslot,
| // mailslot handle
| LPDWORD lpMaxMessageSize,
| // address of maximum message size
| LPDWORD lpNextSize,
| // address of size of next message
| LPDWORD lpMessageCount,
| // address of number of messages
| LPDWORD lpReadTimeout
| // address of read time-out
| );
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Parameters
hMailslot
Identifies a mailslot. The CreateMailslot function must create this handle.
lpMaxMessageSize
Points to a buffer specifying the maximum message size, in bytes, allowed for
this mailslot, when the function returns. This value can be greater than or
equal to the value specified in the cbMaxMsg parameter of the CreateMailslot function that created the mailslot. This parameter can be NULL.
lpNextSize
Points to a buffer specifying the size, in bytes, of the next message, when
the function returns. The following value has special meaning:
Value
| Meaning
| MAILSLOT_NO_MESSAGE
| There is no next message.
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This parameter can be NULL.
lpMessageCount
Points to a buffer specifying the total number of messages waiting to be read,
when the function returns. This parameter can be NULL.
lpReadTimeout
Points to a buffer specifying the amount of time, in milliseconds, a read
operation can wait for a message to be written to the mailslot before a time-out
occurs. This parameter is filled in when the function returns. This parameter can
be NULL.
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
CreateMailslot, SetMailslotInfo
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