ENHF f; // Create an empty object
if (!f.AddFileSection(0,L"1.dat",-1))
// Add a file, say 1000 bytes.
    return 0;

unsigned __int64 sz = f.GetSize(); // Some stuff
unsigned __int64 fp1 = f.GetFP(); 
f.Read(d,sz); // Read all the bytes to some buffer 'd'
f.SetFP(0); // FP gets back

// Now the stream is 1100 bytes, 0 - 99 is empty space
// and 100 - 1099 is the 1.dat file.
f.AddSpace(0,100);
sz = f.GetSize(); 
f.Read(d,sz); 
f.SetFP(0);
f.Write("hello",5); 
f.SetFP(0);
f.Read(d,sz);

// More space added before the last byte of the file.
f.AddSpace(sz - 1,100);
sz = f.GetSize(); 
f.Read(d,sz);
f.SetFP(0);

// This actually writes now 1200 bytes to 2.dat
f.Flush(L"2.dat");
sz = f.GetSize();

// This erases all but the last 5 bytes of the stream
f.Erase(5,sz - 5);
// And write 5 bytes now to 2.dat
f.Flush(L"2.dat");
sz = f.GetSize();