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How to do CreateFileMapping in a C++ DLL and access it in C#, VB and C++

, 10 Mar 2009 CPOL
This is yet another example for memory mapped files. What is cool though is unlike other samples, I have a SetData(TCHAR* Key, TCHAR* value) / GetData(TCHAR* key) pattern here.
MMF_SetData_GetData.zip
tubelite
bin
Client_CSharp.exe
Client_CSharp.vshost.exe
Client_CSharp.vshost.exe.manifest
Client_VBNET.exe
Client_Win32Console.exe
Client_Win32Console.ilk
SHAREDMEM.dll
SHAREDMEM.exp
SHAREDMEM.ilk
SHAREDMEM.lib
CSharpConsumer
bin
Debug
WindowsFormsApplication1.exe
Properties
Settings.settings
SHAREDMEM
module.def
Release
mt.dep
sharedmem.dll.intermediate.manifest
sharedmem.pch
vc90.idb
sharedmem.vcproj.Pranav-PC.Pranav.user
UnmanagedConsumer
Release
mt.dep
Test1.exe.intermediate.manifest
vc90.idb
Test1.vcproj.Pranav-PC.Pranav.user
VBNETConsumer
bin
My Project
Application.myapp
Settings.settings
// The following ifdef block is the standard way of creating macros which make exporting 
// from a DLL simpler. All files within this DLL are compiled with the SHAREDMEM_EXPORTS
// symbol defined on the command line. this symbol should not be defined on any project
// that uses this DLL. This way any other project whose source files include this file see 
// SHAREDMEM_API functions as being imported from a DLL, whereas this DLL sees symbols
// defined with this macro as being exported.
#ifdef SHAREDMEM_EXPORTS
#define SHAREDMEM_API __declspec(dllexport)
#else
#define SHAREDMEM_API __declspec(dllimport)
#endif

// This class is exported from the sharedmem.dll
class SHAREDMEM_API Csharedmem {
public:
	Csharedmem(void);
	// TODO: add your methods here.
};

extern SHAREDMEM_API int nsharedmem;

SHAREDMEM_API TCHAR* fnsharedmem(void);

const TCHAR szMapFileName[] = L"SHAREDMMF";

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About the Author

nkrscorpio
Software Developer
United States United States
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