NetShareCheck function (lmshare.h)

Article
10/13/2021

Checks whether or not a server is sharing a device.

Syntax

NET_API_STATUS NET_API_FUNCTION NetShareCheck(
  [in]  LMSTR   servername,
  [in]  LMSTR   device,
  [out] LPDWORD type
);

Parameters

[in] servername

Pointer to a string that specifies the DNS or NetBIOS name of the remote server on which the function is to execute. If this parameter is NULL, the local computer is used.

[in] device

Pointer to a string that specifies the name of the device to check for shared access.

[out] type

Pointer to a variable that receives a bitmask of flags that specify the type of the shared device. This parameter is set only if the function returns successfully.

One of the following flags may be specified.

Value	Meaning
STYPE_DISKTREE	Disk drive.
STYPE_PRINTQ	Print queue.
STYPE_DEVICE	Communication device.
STYPE_IPC	Interprocess communication (IPC).

In addition, one or both of the following flags may be specified.

Value	Meaning
STYPE_SPECIAL	Special share reserved for interprocess communication (IPC$) or remote administration of the server (ADMIN$). Can also refer to administrative shares such as C$, D$, E$, and so forth. For more information, see Network Share Functions.
STYPE_TEMPORARY	A temporary share.

Return value

If the function succeeds, the return value is NERR_Success.

If the function fails, the return value can be one of the following error codes.

Return code	Description
ERROR_NOT_ENOUGH_MEMORY	Insufficient memory is available.
NERR_DeviceNotShared	The device is not shared.

Remarks

This function applies only to Server Message Block (SMB) shares. For other types of shares, such as Distributed File System (DFS) or WebDAV shares, use Windows Networking (WNet) functions, which support all types of shares.

No special group membership is required to successfully execute the NetShareCheck function.

If you are programming for Active Directory, you may be able to call certain Active Directory Service Interface (ADSI) methods to achieve the same functionality you can achieve by calling the network management share functions. For more information, see IADsFileShare.

Examples

The following code sample demonstrates how to check whether a server is sharing a device, using a call to the NetShareCheck function. The function returns the type of device being shared, as described in the preceding documentation for the type parameter.

#ifndef UNICODE
#define UNICODE
#endif
#include <windows.h>
#include <stdio.h>
#include <lm.h>
#pragma comment(lib, "Netapi32.lib")

void wmain( int argc, TCHAR *argv[ ])
{
   NET_API_STATUS res;
   DWORD devType = 0;

   if(argc<3)
      printf("Usage: NetShareCheck server device\n");
   else
   {
      //
      // Call the NetShareCheck function.
      //
      res=NetShareCheck(argv[1], argv[2], &devType);
      //
      // If the function succeeds, inform the user.
      //
      if(res==0)
         printf("Device is shared as type %u.\n",devType);
      //
      // Otherwise, print the error.
      //
      else
         printf("Error: %u\n", res);
   }
   return;
}

Requirements

Requirement	Value
Minimum supported client	Windows XP [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Target Platform	Windows
Header	lmshare.h (include Lm.h)
Library	Netapi32.lib
DLL	Netapi32.dll