Fixes traceback when checking to see if a user is an Administrator.

http://www.eventghost.net/forum/viewtopic.php?t=10258

eg/WinApi/User.py

@@ -16,18 +16,133 @@
 # You should have received a copy of the GNU General Public License along
 # with EventGhost. If not, see <http://www.gnu.org/licenses/>.
 
-import win32api
 import win32net
-import platform
+
+import ctypes
+from ctypes.wintypes import (
+    INT,
+    BOOLEAN,
+    ULONG,
+    BOOL
+)
+
+secur32 = ctypes.windll.Secur32
+shell32 = ctypes.windll.Shell32
+netapi32 = ctypes.windll.Netapi32
+
+
+class ENUM(INT):
+    pass
+
+
+class EXTENDED_NAME_FORMAT(ENUM):
+    # An unknown name type.
+    NameUnknown = 0x00
+    # The fully qualified distinguished name.
+    # CN=Jeff Smith,OU=Users,DC=Engineering,DC=Microsoft,DC=Com
+    NameFullyQualifiedDN = 0x01
+    # A legacy account name (for example, Engineering\JSmith).
+    # The domain-only version includes trailing backslashes (\).
+    NameSamCompatible = 0x02
+    # A "friendly" display name (for example, Jeff Smith).
+    # The display name is not necessarily the defining relative
+    # distinguished name (RDN).
+    NameDisplay = 0x03
+    # A GUID string that the
+    # IIDFromString function returns
+    # (for example, {4fa050f0-f561-11cf-bdd9-00aa003a77b6}).
+    NameUniqueId = 0x04
+    # The complete canonical name
+    # (for example, engineering.microsoft.com/software/someone).
+    # The domain-only version includes a trailing forward slash (/).
+    NameCanonical = 0x05
+    # The user principal name (for example, someone@example.com).
+    NameUserPrincipal = 0x06
+    # The same as NameCanonical except that the rightmost forward
+    # slash (/) is replaced with a new line character (\n), even in
+    # a domain-only case
+    # (for example, engineering.microsoft.com/software\nJSmith).
+    NameCanonicalEx = 0x07
+    # The generalized service principal name
+    # (for example, www/www.microsoft.com@microsoft.com).
+    NameServicePrincipal = 0x08
+    # The DNS domain name followed by a backward-slash and the SAM user name.
+    NameDnsDomain = 0x09
+    # The Users first name
+    NameGivenName = 0x0A
+    # The users last name
+    NameSurname = 0x0B
+
+
+# BOOLEAN SEC_ENTRY GetUserNameExW(
+#   EXTENDED_NAME_FORMAT NameFormat,
+#   LPWSTR               lpNameBuffer,
+#   PULONG               nSize
+# );
+_GetUserNameExW = secur32.GetUserNameExW
+_GetUserNameExW.restype = BOOLEAN
+
+
+def GetUserNameExW(NameFormat):
+    if not isinstance(NameFormat, EXTENDED_NAME_FORMAT):
+        NameFormat = EXTENDED_NAME_FORMAT(NameFormat)
+
+    lpNameBuffer = ctypes.create_unicode_buffer(255)
+    nSize = ULONG(254)
+
+    _GetUserNameExW(NameFormat, lpNameBuffer, ctypes.byref(nSize))
+
+    return lpNameBuffer.value
+
+
+def IsDomainLogin():
+    """
+    Retrieves if the logged in user is logged into a domain.
+
+    :rtype: bool
+    """
+
+    if GetUserNameExW(EXTENDED_NAME_FORMAT.NameCanonical):
+        return True
+
+    return False
+
+
+# BOOL IsUserAnAdmin();
+
+_IsUserAnAdmin = shell32.IsUserAnAdmin
+_IsUserAnAdmin.restype = BOOL
+
+
+def IsLocalAdmin():
+    """
+    Retrieves if the logged in user is a member of the local administrators
+    group.
+
+    :rtype: bool
+    """
+    return bool(_IsUserAnAdmin())
+
+
+def IsDomainAdmin():
+    """
+    Retrieves if the logged in user is logged into a domain and if they are in
+    the administrators group of that domain. If the RPC service is not running
+    this will return False.
+
+    :rtype: bool
+    """
+
+    return IsDomainLogin() and IsLocalAdmin()
 
 
 def NameSamCompatible():
     """
     Retrieves the domain/username of the current user.
-    
+
     :rtype: str
     """
-    return win32api.GetUserNameEx(win32api.NameSamCompatible)
+    return GetUserNameExW(EXTENDED_NAME_FORMAT.NameSamCompatible)
 
 
 def Name():
@@ -50,52 +165,12 @@ def Domain():
 
 def Groups(user_name=Name(), server=None):
     """
-    Retrieves direct and indirect group name the username is a member of for a 
-    specific computer/server. If no parameters are passed it will default to 
+    Retrieves direct and indirect group name the username is a member of for a
+    specific computer/server. If no parameters are passed it will default to
     the current user and the local computer.
-    
+
     :type user_name: str
     :type server: str
     :rtype: list
     """
     return win32net.NetUserGetLocalGroups(server, user_name)
-
-
-def IsDomainLogin():
-    """
-    Retrieves if the logged in user is logged into a domain.
-
-    :rtype: bool
-    """
-    return Domain() == platform.node()
-
-
-def IsLocalAdmin():
-    """
-    Retrieves if the logged in user is a member of the local administrators 
-    group.
-
-    :rtype: bool
-    """
-    return 'Administrators' in Groups()
-
-
-def IsDomainAdmin():
-    """
-    Retrieves if the logged in user is logged into a domain and if they are in 
-    the administrators group of that domain. If the RPC service is not running
-    this will return False.
-
-    :rtype: bool
-    """
-
-    if Domain() == platform.node():
-        return False
-    else:
-        try:
-            return 'Administrators' in Groups(server=Domain())
-        except win32net.error as err:
-            if err[0] == 1722:
-                return False
-            else:
-                raise