Windows ex functions

The handling of input buffers depends on the Windows version. Starting with Windows 8, the kernel captures all input buffers pointed to by members of the Argument2 structures in system memory before calling the RegistryCallback routine.

In versions of Windows before Windows 8, the kernel probes all members of the Argument2 structures that point to input buffers in user-mode memory, but captures only some of these buffers in system memory. Additionally, if the callback routine needs to pass an input buffer pointer to a system routine for example, ZwOpenKey , and the buffer is in user-mode memory, the callback routine must first capture the buffer.

The following table summarizes the requirements for buffer accesses by the RegistryCallback routine. For more information about RegistryCallback routines and registry filter drivers, see Filtering Registry Calls. To define a RegistryCallback callback routine, you must first provide a function declaration that identifies the type of callback routine you're defining.

Windows provides a set of callback function types for drivers. Declaring a function using the callback function types helps Code Analysis for Drivers , Static Driver Verifier SDV , and other verification tools find errors, and it's a requirement for writing drivers for the Windows operating system. Skip to main content. Send comments about this topic to Microsoft. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info.

Contents Exit focus mode. Viewed 14k times. My assumption is that this stands for Extension or Extra could someone please confirm? Any history on why Ex was chosen rather then MyApiCall2 or similar would also be appreciated. Improve this question. Maxim Gershkovich Maxim Gershkovich It stands for "'Ex'cuse us, but we didn't make this thing correctly the first time, but we can't just add on to this function because it would break the existing interface, so have this new function!

Andrew: I'd say your're probably right. We're just lucky they haven't unleashed the Ex2 API on us yet. Add a comment. Active Oldest Votes. Improve this answer. James Oswald 2 2 gold badges 9 9 silver badges 22 22 bronze badges. I wonder what you make of VirtualAlloc2 and CreateFile2 then Sign up or log in Sign up using Google.