MapFile

Description

Short story: Maps a file into your process's memory space, so you can reference it using pointer operations.

Longer description from old site: click here.

To be edited...

Published

This sample, or the one from which it originally derived, was published (or at least peripherally mentioned) in the following article(s):

Move Data With Memory-Mapped Files, Ask the VB Pro, VBPJ, October 1999

Modify a Variable's Pointer, Black Belt Programming, VBPJ, July 2000

APIs Usage

This sample uses the following API calls:

Module Library Function

CFileDlg.cls comdlg32

kernel32 CommDlgExtendedError
GetFileTitle
GetOpenFileName
GetSaveFileName
lstrlen

CMapFile.cls kernel32

CloseHandle
CreateFile
CreateFileMapping
FlushViewOfFile
GetFileSize
MapViewOfFile
OpenFileMapping
ReadFile
UnmapViewOfFile
WriteFile

CSafeArray.cls msvbvm50 VarPtr

CStopWatch.cls winmm

timeBeginPeriod
timeEndPeriod
timeGetDevCaps
timeGetTime

Don't see what you're looking for? Here's a complete API cross-reference.

Module	Library	Function
CFileDlg.cls	comdlg32 kernel32	CommDlgExtendedError GetFileTitle GetOpenFileName GetSaveFileName lstrlen
CMapFile.cls	kernel32	CloseHandle CreateFile CreateFileMapping FlushViewOfFile GetFileSize MapViewOfFile OpenFileMapping ReadFile UnmapViewOfFile WriteFile
CSafeArray.cls	msvbvm50	VarPtr
CStopWatch.cls	winmm	timeBeginPeriod timeEndPeriod timeGetDevCaps timeGetTime

Download

Please, enjoy and learn from this sample. Include its code within your own projects, if you wish. But, in order to insure only the most recent code is available to all, I ask that you don't share the sample by any form of mass distribution.
Download MapFile.zip, 39Kb, Last Updated: Thursday, April 29, 2004