File read write with synchronization

[Maddy]

Hello all,
I am writing an exe which does some functionality. I am writing logs to a file from that exe. From the same exe i am launching a DLL using LoadLibrary(). Now from the dll also i want to write logs to same log file which is created by the exe. Since i am getting file locked error when i try access that file from DLL. Can anyone tell me some solution for this?? I am using CreateFile api of windows. So what i need to do in order to write logs to same log files to which the exe is writing?? Please help me i am in trouble..
Thanks in advance.

[ventsyv]

You have to pass in the stream reference in the dll method before you can write. Opening a new write stream will not work because the file is locked.