| BOOL IsAddressNull( |
| |
LPCTSTR lpszAddress |
|
| ); |
| BOOL IsAddressNull( |
| |
LPINTERNET_ADDRESS lpAddress |
|
| ); |
The IsAddressNull method determines if the IP address is
null.
Parameters
- lpszAddress
- A string that specifies the IP address.
- lpAddress
- A pointer to an INTERNET_ADDRESS structure that specifies the
IP address.
Return Value
If the method succeeds and the IP address is null, or the parameter is a NULL pointer, the
return value is non-zero. If the method fails or the address is not
null, the return value is zero. If the address family is not supported,
the last error code will be updated. If the address is valid but not
null, the last error code
will be set to NO_ERROR.
Remarks
A null IP address is one where all bits for the address (32 bits
for IPv4 or 128 bits for IPv6) are zero. This is a special address
that is typically used when creating a passive socket that should
listen for connections on all available network interfaces.
Requirements
Minimum Desktop Platform: Windows 7 Service Pack 1
Minimum Server Platform: Windows Server 2008 R2 Service Pack 1
Header File: cswsock11.h
Import Library: cswskv11.lib
See Also
GetAddress,
IsAddressRoutable,
INTERNET_ADDRESS
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