Easy way to fix Win32 to get hostname

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Sometimes your system may generate an error code indicating that win32 is getting a hostname. There can be many reasons for this error.

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The gethostname operation retrieves the default hostname of the personal computer.

Syntax

  int gethostname ( Character `s name,  int name);

Parameters

Pointer to a buffer that receives the local hostname.

The path in bytes to the buffer referenced by the name parameter.

Doesn’t Return Any Value

In case of calculation errorgethostname returns null. Otherwise, SOCKET_ERROR is returned and the specific code error can be corrected by calling WSAGetLastError .

Error code	Value
DEFAULT WSAEF	The name parameter is usually an EMPTY pointer or an invalid part of the user’s address respawn. This error is also returned if the size of the obstacle specified by the namelen parameter is too small to contain the fully qualified name of the output.
BZANOTINITIALIZATION	SuccessA WSAStartup call must be made before this function.
WSAENETDOWN	Failure of the network subsystem.
WSAEINPROGRESS	A blocking Windows Sockets 1.1 call is in progress, or the service provider is still processing the callback.

The gethostname function returns your current local hostname in the exact buffer specified by the name parameter. The hostname returned is a good null terminated string. The form of the hostname can differ depending on the Windows socket provider – it can be a simple hostname or a fully qualified address name. However, it is guaranteed to return a name that has been successfully parsed gethostbyname and WSAAsyncGetHostByName .

The maximum length of a name returned in the buffer pointed to by all name parameters depends on the namespace.

IfThe gethostname function is used for a cluster resource running Windows Server 2008, Windows Server 2003, or. usedWindows 2000 Server and the CLUSTER_NETWORK_NAME environment can be configured differently, and then the value of this skill environment variable is overwritten and returned as the actual hostname as well. On a cluster resource, the CLUSTER_NETWORK_NAME environment usually contains a revariable, a name that refers to the cluster.

The gethostname function queries the namespace providers for the actual definition of the local namespace host using the SVCID_HOSTNAME GUID defined in the Svgguid.h h2 tag file. If the namespace provider is not behaving,Gethostname returns the NetBIOS name of the local computer.

The maximum length (bytes) of the returned string pointed to by the name parameter definitely depends on the namespace provider, but that valuable string must be 256 bytes or a lot. Thus, if a 256-byte buffer is normally passed in the name parameter in addition to the namelen parameter to help 256, the buffer size will still be sufficient.

Note If no local hostname is specified,gethostname must succeed and return hostname expression gethostbyname orSometimes WSAAsyncGetHostByName can be resolved.

Windows Phone 8: This feature is supported when using Windows Phone Store apps and Windows Phone 8 later.

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Windows 8.1 or Windows Server 2012 R2: This feature is definitely supported for Windows Store apps in Windows 8.1, Windows Server 2012 R2and later.

Requirements


Client supported at least	Windows 8.1, Windows Vista [UWP desktop apps \| Applications]
The server is at least overloaded	Windows Server 2003 [UWP Desktop Applications \| Applications]
Target Platform	Windows
Title	winsock.h (including Winsock2.h)
Library	Ws2_32.lib
DLL	Ws2_32.dll

Syntax

  BOOL GetComputerNameA (  LPSTR lpBuffer,  LPDWORD nSize);

Parameters

Pointer to a buffer expanding the computer name or concatenating the name of the primary server. The buffer size must be large enough to contain unique characters + max_computername_length.

Determines the size assigned to the buffer in the input TCHARs. On exit, the TCHAR copied to the target obstruction for the direction number is displayed without a terminating null character.

If this buffer is too small, the function will not work and GetLastError will return ERROR_BUFFER_OVERFLOW. The lpnSize parameter sets the size of the buffer that contains the required trailing null character.

Return Value

If the main function succeeds, the return value is nonzero.

If the function fails, the incremented return value is zero. For more detailed advice, go to the error GetLastError .

The GetComputerName function retrieves the NetBIOS phrase generated on the boot system. Name changes propagate AskYour computer name orThe SetComputerNameEx functions do not work directly until the user reboots the computer.

If the caller is in a participant session, the function will return the site name. To get the customer’s name, use the WTSQuerySessionInformation function.

Examples

Requirements


Client supported at least	Windows 2000 Professional Applications [Desktop \| UWP Apps]
Minimum Supported Server	Windows 2000 Server Applications [Desktop \| UWP Apps]
Target Platform	Windows
Title	winbase.h (including Windows.h)
Library	Kernel32.lib
DLL	Kernel32.dll