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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
| mpr.lib
| Header File
| winnetwk.h
| Unicode
| WinNT
| Platform Notes
| None
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WNetGetLastError
The WNetGetLastError function retrieves the most recent extended error code set by a Windows
network function.
DWORD WNetGetLastError(
LPDWORD lpError,
| // pointer to error code
| LPTSTR lpErrorBuf,
| // pointer to string describing error
| DWORD nErrorBufSize,
| // size of description buffer, in characters
| LPTSTR lpNameBuf,
| // pointer to buffer for provider name
| DWORD nNameBufSize
| // size of provider name buffer
| );
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Parameters
lpError
Points to the variable that receives the error code reported by the network
provider. The error code is specific to the network provider.
lpErrorBuf
Points to the buffer that receives the null-terminated string describing the
error.
nErrorBufSize
Specifies the size, in characters, of the buffer pointed to by the lpErrorBuf parameter. If the buffer is too small for the error string, the string is
truncated but still null-terminated. A buffer of at least 256 characters is
recommended.
lpNameBuf
Points to the buffer that receives the null-terminated string identifying the
network provider that raised the error.
nNameBufSize
Specifies the size, in characters, of the buffer pointed to by the lpNameBuf parameter. If the buffer is too small for the error string, the string is
truncated but still null-terminated.
Return Values
If the function successfully obtains the last error reported by the provider,
the return value is NO_ERROR. If the caller supplies an invalid buffer, it is
ERROR_INVALID_ADDRESS.
Remarks
WNetGetLastError is used to obtain errors that are specific to a network provider. It should
be used when a Windows network function (or the GetLastError function) returns ERROR_EXTENDED_ERROR. Like GetLastError, the function returns extended error information, which is maintained on a
per-thread basis. Unlike GetLastError, the WNetGetLastError function can also return a string for reporting errors that are not described
by any existing error code.
See Also
GetLastError
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