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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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WNetEnumResource
The WNetEnumResource function continues a network-resource enumeration started by the WNetOpenEnum function.
DWORD WNetEnumResource(
HANDLE hEnum,
| // handle to enumeration
| LPDWORD lpcCount,
| // pointer to entries to list
| LPVOID lpBuffer,
| // pointer to buffer for results
| LPDWORD lpBufferSize
| // pointer to buffer size variable
| );
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Parameters
hEnum
Identifies an enumeration instance. This handle must be returned by WNetOpenEnum.
lpcCount
Points to a variable specifying the number of entries requested. If the number
requested is 0xFFFFFFFF, the function returns as many entries as possible.
When the function finishes successfully, the variable pointed to by this
parameter contains the number of entries actually read.
lpBuffer
Points to the buffer that receives the enumeration results, which are returned
as an array of NETRESOURCE structures. The buffer is valid until the next call using the handle given by
the hEnum parameter. The order of NETRESOURCE structures in the array is not predictable.
lpBufferSize
Points to a variable that specifies the size, in bytes, of the lpBuffer parameter. If the buffer is too small to receive even one entry, this
parameter receives the required size of the buffer.
Return Values
If the function succeeds, the return value is one of the following values:
Value
| Meaning
| NO_ERROR
| The enumeration succeeded, and the buffer contains the requested data. The
calling application can continue to call WNetEnumResource to complete the enumeration.
|
ERROR_NO_MORE_ITEMS
| There are no more entries. The buffer contents are undefined.
|
If the function fails, the return value is an error code. To get extended
error information, call GetLastError. GetLastError may return one of the following error codes:
Value
| Meaning
| ERROR_MORE_DATA
| More entries are available with subsequent calls.
| ERROR_INVALID_HANDLE
| The handle given by the hEnum parameter is not valid.
| ERROR_NO_NETWORK
| No network is present. This condition is tested before hEnum is tested for validity.
| ERROR_EXTENDED_ERROR
| A network-specific error occurred. To get a description of the error, use the WNetGetLastError function.
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The function returns error codes for compatibility with Windows version 3.1.
For compatibility with the Win32 API, the function also sets the error code
value returned by GetLastError.
Remarks
An application cannot set the lpBuffer parameter to NULL and retrieve the required buffer size from the lpBufferSize parameter. Instead, the application should allocate a buffer of a reasonable
size  16 kilobytes (K) is typical and use the value of lpBufferSize for error detection.
See Also
NETRESOURCE, WNetCloseEnum, WNetGetLastError, WNetOpenEnum
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