OpenFile API

This is a discussion on OpenFile API within the Windows Programming forums, part of the Platform Specific Boards category; My question : Program 1 opens a file with the OpenFile API: OFSTRUCT TestOF; OpenFile("c:\test.txt",&TestOF, ... ); Now i was ...

  1. #1
    Registered User
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    Apr 2002
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    1

    OpenFile API

    My question :

    Program 1 opens a file with the OpenFile API:
    OFSTRUCT TestOF;
    OpenFile("c:\\test.txt",&TestOF, ... );

    Now i was wondering how i could (re)open the same file
    in another program with the OpenFile API:
    OFSTRUCT TestOF2;
    OpenFile("c:\\test.txt",&TestOF2,OF_REOPEN|OF_READ WRITE);
    (TestOF2 should be pointing to TestOF)

    If i use OF_REOPEN|OF_READWRITE attributes i have to know the address where
    program 1 stored the TestOF variable.
    Cause i need to use that if i want to reopen it.
    Somebody got a clue?
    thx in advance

  2. #2
    Registered User johnnie2's Avatar
    Join Date
    Aug 2001
    Posts
    186
    If you wanted to tell the other program the address of the struct, you could make TestOF a global pointer, sending it as a WPARAM or LPARAM in a custom window message that would be sent to program two. FindWindow() would be used to fetch program two's window. I was originally going to suggest using pipes, but the same problem arises as you have to set up some way for the reading program to obtain the read-only handle, but that's a different challenge.
    "Optimal decisions, once made, do not need to be changed." - Robert Sedgewick, Algorithms in C

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