# Create_Share.ps1
# Creates a share on the local computer using WMI and Create static method
# thomas lee - tfl@psp.co.uk

# create pointer to class
$comp=[WMICLASS]"Win32_share"

# create a new share
$comp.create("c:\","mynewshare",0)

  
# see results
gwmi win32_share 

When run on my system results are as follows:

__GENUS          : 2
__CLASS          : __PARAMETERS
__SUPERCLASS     :
__DYNASTY        : __PARAMETERS
__RELPATH        :
__PROPERTY_COUNT : 1
__DERIVATION     : {}
__SERVER         :
__NAMESPACE      :
__PATH           :
ReturnValue      : 0


PS C:\foo> GWMI win32_share | ft name, path, description -auto

name       path                                         description
----       ----                                         -----------
ADMIN$     C:\Windows                                   Remote Admin
C$         C:\                                          Default share
CertEnroll C:\Windows\system32\CertSrv\CertEnroll       Active Directory Certificate Services share
E$         E:\                                          Default share
IPC$                                                    Remote IPC
NETLOGON   C:\Windows\SYSVOL\sysvol\gktrain.net\SCRIPTS Logon server share
newshare   C:\
P$         P:\                                          Default share
SYSVOL     C:\Windows\SYSVOL\sysvol                     Logon server share

The documentation is not clear here, but the Create Method is static.

With PowerShell, you can see this method using [wmiclass] type accellerator as follows:

PCS c:\foo>  [WMICLASS]'Win32_share' | get-member
TypeName: System.Management.ManagementClass#ROOT\cimv2\Win32_Share 

  Name MemberType Definition 
---- ---------- ---------- 
Name AliasProperty Name = __Class 
Create Method System.Management.ManagementBaseObject Create(System.String Path, System.String Name, System.UInt32 ... 
__CLASS Property System.String __CLASS {get;set;} 
__DERIVATION Property System.String[] __DERIVATION {get;set;} 
__DYNASTY Property System.String __DYNASTY {get;set;} 
__GENUS Property System.Int32 __GENUS {get;set;} 
__NAMESPACE Property System.String __NAMESPACE {get;set;} 
__PATH Property System.String __PATH {get;set;} 
__PROPERTY_COUNT Property System.Int32 __PROPERTY_COUNT {get;set;} 
__RELPATH Property System.String __RELPATH {get;set;} 
__SERVER Property System.String __SERVER {get;set;} 
__SUPERCLASS Property System.String __SUPERCLASS {get;set;} 
ConvertFromDateTime ScriptMethod System.Object ConvertFromDateTime(); 
ConvertToDateTime ScriptMethod System.Object ConvertToDateTime();