get command problem...

[dc_2000]

Your whole approach is wrong.

(1) As I pointed out in my first post and as Philip Nicoletti said, when you call:

string(buffer,from,until);

there's no template that takes char* pointer followed by an int, so your code is technically truncated to:

string(buffer);

and 'buffer' is treated as a NULL terminated string, so if it isn't it can easily cause a memory fault.

(2) Transmitting data through a socket is not done as a continuous stream of char's. You need to create a custom type, put it into a header file shared by both sender and receiver and validate it before you attempt reading a 'char' string from it:

struct MY_SOCKET_DATA{
    DWORD dwStructID;      //Special ID to identify this struct
    int ncbSzTotal;               //Total size of transmitted data in bytes
    int nSzString;                 //Size of string in char's
    char String[0];               //Beginning of transmitted ANSI string
};


//Validation
MY_SOCKET_DATA* pSD = (MY_SOCKET_DATA*)pSocketRawData;
if(pSD->dwStructID == UNIQUE_TRANSMISSION_ID &&
    pSD->ncbSzTotal == ncbSocketRawDataLength)
{
    //Now you can read 'pSD->nSzString' number of chars from 'pSD->String'
}

(3) And use debugger to see what's going on with your code.