About OpenFileMapping

yumen1235

HANDLE hMap = CreateFileMapping (INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE | SEC_COMMIT, 0,256, "S_DATA");
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}

void CTest4Dlg :: OnButton2 ()
{
HANDLE m_hMap = OpenFileMapping (FILE_MAP_READ, FALSE, "S_DATA");
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}
I wrote an example, but when I use OpenFileMapping to open the mapping address, hMap is not equal to m_hMap, so when I call MapViewOfFile to read the data in button2, an error occurs.
Excuse me, why are hMap and m_hMap not equal? ​​Where am I wrong? Thank you for your help.

tianfeng

If your application is running in a termal server and you need access your file mapping from another user's account, add Global\\prefix to your object name, and modify the access control list when you create the object.

yumen1235

I just want to store a structure in memory. Access by other processes. I am not mapping a file into memory. I don't quite understand what you mean. Can you be more specific and post the code?

lcdxhj

Then create a shared segment.

lixiaof6471

What is wrong?

yumen1235

already solved. Thank you

miaowsyf

Host, how is sharing a structure realized, can you leave the source code or hint?
I read a structure into memory in process A, but process B did not get it.