Hi, all
       I have a sample code like the following detailed:
       //-----------------
       FILE *fp1;
       fp1=fopen("F:\\aa.dat","rb");
       if(!feof(fp1))
        {
         // Step 1 :the following code is to read binary data from an
existing file
         CString ss;
         fread(ss.GetBuffer(1428),1428,1,fp1);

        // Step 2: the following code is to test if the read action is
successful
        fclose(fp1);
        fp1 = fopen("F:\\bb.dat","wb+");
        fwrite(ss,1428,1,fp1);
        fclose(fp1);
        // Step 3:the following code is to test the GetLength function!
        int i;
        i = ss.GetLength();
        }
       //-----------------------------
       My question is : Why the value of i is 0, not the exact string
length? Could anybody tell me the root cause?

Thanks in advance!

Joseph