Create Unmanaged DLL for Writing and Reading from Memory Mapped File with Tests [UPDATED]

Memory Mapped File Dynamic Link Library ("mmap.dll")

You are to create an Unmanaged DLL file for import into MT4. The purpose of the library will be to write to a Memory Mapped File and later read from that Memory Mapped File. Your output DLL file will have the following exported function

void CreateChannel(string fileName) # Create or Open Memory-Mapped File (MasterFile_[@fileName])

void WriteToChannel(string fileName, string data) # Write @data to @fileName

string ReadFromChannel(string fileName) # Read content of @fileName and return it as a string

void RefReadFromChannel(string fileName, string &recvString) # Read content of @fileName and pass by reference to @recvString

After creating the DLL file, you are to write a test MQL4 Expert that will read and write to and from the Memory Mapped Files created by the DLL library created.

Unmanaged DLL file best created with Visual C++

Here are some useful links

https://docs.microsoft.com/en-us/windows/win32/memory/creating-named-shared-memory

https://docs.microsoft.com/en-us/windows/win32/psapi/memory-mapped-file-information

https://gunnarpeipman.com/net-framework-4-0-using-memory-mapped-files/

https://www.red-gate.com/simple-talk/dotnet/net-development/sharing-caring-using-memory-mapped-files-net/

https://www.c-sharpcorner.com/UploadFile/b942f9/using-memory-mapped-files/