IHttpUser::GetUserVariable Method

IIS 7.0

Returns the custom user data by name.

virtual PVOID GetUserVariable(
   IN PCSTR pszVariableName
) = 0;


[IN] A pointer to a constant null-terminated string that contains the variable name of the data to retrieve.

A void pointer that contains the upcast custom data.

The default is HTTP_USER_VARIABLE_SID, which is defined in the Httpserv.h header file.

IHttpUser implementers are responsible for memory management with this data; therefore, IHttpUser implementers that use dynamic memory allocation must release or delete the void pointer when it is no longer needed.

IHttpUser implementers are responsible for memory management with this data; therefore, IHttpUser clients must not release or delete the returned void pointer when this data is no longer needed. Furthermore, clients must not change the state of the memory referenced by this void pointer, because an access violation will be thrown or the data will become invalid.


The following code example demonstrates how to create an HTTP module that clears the response headers and body and then returns user information to the client as an XML document.

The above code writes XML that is similar to the following to the response stream.

<?xml version="1.0" ?>
<user userName="DOMAIN\user" />

Your module must export the RegisterModule function. You can export this function by creating a module definition (.def) file for your project, or you can compile the module by using the /EXPORT:RegisterModule switch. For more information, see Walkthrough: Creating a Request-Level HTTP Module By Using Native Code.

You can optionally compile the code by using the __stdcall (/Gz) calling convention instead of explicitly declaring the calling convention for each function.





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