Memory files

The default implementation uses the run-time library function malloc to allocate memory. This means that the data in the memory block before it was attached to CMemFile will be used as the file. Memory files created in this manner can't be grown. Since the file can't be grown, be careful not to cause CMemFile to attempt to grow the file. If nGrowBytes is greater than 0, CMemFile will ignore the contents of the memory block you've attached. Growing the memory allocation will fail if the memory block you pass to Attach wasn't allocated with a method compatible with Alloc.

To be compatible with the default implementation of Alloc , you must allocate the memory with the run-time library function malloc or calloc. The file is opened by the constructor.

Don't call CFile::Open. The second overload acts the same as if you used the first constructor and immediately called Attach with the same parameters. See Attach for details. Calling this function also closes the CMemFile. You can reattach the memory block to CMemFile by calling Attach. What I want is the file to be temporary but be able to be emailed.

Can I do this? You can use static method System. GetTempFileName which will create a file with unique name in Tempory files folder in Windows and return full path of it, You can use that path to instantiate a FileStream object write to it use it, and it'll be deleted when some one will run Disk Clean up or if there is another routine for that.

So you dont need to worry about that many programs use this place to store temp files! Forgot something I did a while ago I think Why dont you delete the file once you have used it in the application? The end program will be a Windows Service and I am not sure if I can create files in the application directory without messing up the service.

If I could I would do it that way. Your hardware manufacturer provides support because an xbased version of Windows was included with your hardware. Your hardware manufacturer might have customized the installation of Windows with unique components. Unique components might include specific device drivers or might include optional settings to maximize the performance of the hardware. Microsoft will provide reasonable-effort assistance if you need technical help with your xbased version of Windows.

However, you might have to contact your manufacturer directly. Your manufacturer is best qualified to support the software that your manufacturer installed on the hardware. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info.

Contents Exit focus mode. Please rate your experience Yes No. Any additional feedback? Note In Windows 7, the paging file can be on a partition that differs from the partition on which the operating system is installed. In Windows 7, you do not have to use the DedicatedDumpFile registry entry to put a paging file onto another partition. The small memory dump file can be useful when hard disk space is limited. However, because of the limited information that is included, errors that were not directly caused by the thread that was running at the time of the problem may not be discovered by an analysis of this file.

Because there are several versions of Microsoft Windows, the following steps may be different on your computer. If they are, see your product documentation to complete these steps. Click the Advanced tab, and then click Settings under Startup and Recovery.

In the Write debugging information list, click Small memory dump 64k. To change the folder location for the small memory dump files, type a new path in the Dump File box or in the Small dump directory box, depending on your version of Windows. Use the Dump Check Utility Dumpchk. The Dump Check Utility does not require access to debugging symbols.

Symbol files hold a variety of data which are not actually needed when running the binaries, but which could be very useful in the debugging process. Or, you can use the Windows Debugger WinDbg. WinDbg and KD. Select the Typical installation. By default, the installer installs the debugging tools in the following folder:.

This Web page also provides access to the downloadable symbol packages for Windows. For more information about dump file options in Windows, see Overview of memory dump file options for Windows.