Gradekeeper 64 bit1/10/2024 ![]() Look like a valid handle in process B's context. That means thatĪ handle to an object that belongs to process A might coincidentally The Bitness registry key indicates whether the Outlook 2010 installation is 32-bit or 64-bit. If you have installed Office 2010 including Microsoft Outlook 2010, Outlook sets a registry key named Bitness of type REGSZ on the computer on which it is installed. That resides in a Win32-based application's address space and isĬalled by the application.) In other words, handle tables are kept onĪ per-process basis, but they are not process-tagged. From TechNet article on 64-bit editions of Office 2010. Implemented as offsets into a handle table that resides on the client Well, what happens here is that handles to GDI objects are internally Any other void* handle (like HBRUSH, HBITMAP etc) might be truncatable because only the lower 32 bits are significant all right, but it's not valid outside its own process.įor GDI objects it might work because these are actually indices (see (v=msdn.10)) To add to the previous correct answers, let me note that a HWND is also a valid handle across processes. In the Windows version of Gradekeeper, right-click in the report window. In the Macintosh version of Gradekeeper, click in the report window. Scroll to the student report you want to print. ![]() Note the distinction between "sign-extending" a handle versus "zero-extending" a handle.Įdit: Judging from discussion seen in a deleted answer to this question, I suppose that the significance of sign-extending a 32-bit handle to arrive at a 64-bit handle instead of zero-extending it is to retain proper treatment of the INVALID_HANDLE_VALUE value for a handle. First choose Student Scores from the Reports menu. Zero-extending 32 bits handles to 64 bits, or vice versa by truncatingĦ4 bits handles to 32 bits discarding the top bits. The proper way to share such handles across process boundaries is by It's also worth noting this comment added on that page: Named objects such as mutexes, semaphores, and file handles. Objects such as pens and brushes (HBRUSH and HPEN), and handles to Include handles to user objects such as windows (HWND), handles to GDI (when passing it from 64-bit to 32-bit) or sign-extend the handle Lower 32 bits are significant, so it is safe to truncate the handle When sharing a handle between 32-bit and 64-bit applications, only the Interprocess Communication Between 32-bit and 64-bit ApplicationsĦ4-bit versions of Windows use 32-bit handles for interoperability.
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