Share file

Hi

I try to explain what I want to do

- Two application try to open a files (A,B)

If the first open in Read/write, the second is open it just in read.

This is my code, is work

if A open the file, B open it (ReadOnly) with a message (file is opened) GOD.

BUT if A open the file, B open it (ReadOnly), A close it and try the open again (the file is opened but in read/write),

HANDLE ProtFolioHnd = CreateFile ( FileName, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ ,NULL, OPEN_EXISTING ,

FILE_ATTRIBUTE_NORMAL , NULL );

if ( ProtFolioHnd == INVALID_HANDLE_VALUE ){

char Buffer[80];

ProtFolioHnd = CreateFile ( FileName, GENERIC_READ , FILE_SHARE_READ,

NULL, OPEN_EXISTING , FILE_ATTRIBUTE_NORMAL , NULL );

if( ProtFolioHnd!=INVALID_HANDLE_VALUE ){

//ReadOnly

_snprintf(Buffer,80,"%s : Is read-only.",FileName);

}

else{ // File is open by other application

_snprintf(Buffer,80,"%s : Is being used by another user.",FileName);

ProtFolioHnd = CreateFile ( FileName, GENERIC_READ ,

FILE_SHARE_READ|FILE_SHARE_WRITE,NULL,OPEN_EXISTING

,FILE_ATTRIBUTE_READONLY , NULL );

}

MessageBox ( GetActiveWindow(), Buffer,"Estimates Direct", MB_OK);

}


Thanks