( IN UpnpClient_Handle Hnd,
   IN const char* ActionURL,
   IN const char* VarName,
   OUT DOMString* StVarVal )
UpnpGetServiceVarStatus queries the state of a state  variable of a service on another device.
Documentation
UpnpGetServiceVarStatus queries the state of a state 
variable of a service on another device.  This is a synchronous call.
A positive return value indicates a SOAP error code, whereas a negative
return code indicates an SDK error code. Note that the use of this 
function is deprecated by the UPnP Forum.
- Parameters:
- Hnd -   The handle of the control point. 
 ActionURL -   The URL of the service.
 VarName -   The name of the variable to query.
 StVarVal -   The pointer to store the value 
for VarName. The SDK 
allocates this string and the caller 
needs to free it using 
ixmlFreeDOMString.
 
- Returns:
-   [int] An integer representing one of the following:
-  UPNP_E_SUCCESS: The operation completed successfully.
-  UPNP_E_INVALID_HANDLE: The handle is not a valid control 
point handle.
-  UPNP_E_INVALID_URL: ActionUrl is not a valid URL.
-  UPNP_E_INVALID_DESC: The XML document was not 
found or it does not contain a valid XML description.
-  UPNP_E_INVALID_PARAM: StVarVal is not a valid 
pointer or VarName or ActionUrl is NULL. 
-  UPNP_E_OUTOF_MEMORY: Insufficient resources exist to 
complete this operation.
-  UPNP_SOAP_E_INVALID_VAR: The given variable is invalid 
according to the device.
 
 
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