Output problem in mysql query in MFC program

I'm currently working on a small MFC program that outputs data from a mysql database. I can get output when i'm using an sql statement that does not contain any variable eg.

select album from Artists;

but when i try to use a variable the program compiles but i get no output eg. mysql_perform_query(conn,select album from Artists where artists = '"+m_search_edit"'")

Here is the function for mysql_perform_query:

MYSQL_RES* mysql_perform_query(MYSQL *conn, const char* query)
{
   // send the query to the database
   if (mysql_query(conn, query))
   {
     // printf("MySQL query error : %s\n", mysql_error(conn));
     // exit(1);
   }

   return mysql_use_result(conn);
}

And here is the code block for outputting the data:

struct connection_details mysqlD;


mysqlD.server = "www.freesqldatabase.com";  // where the mysql database is
mysqlD.user = "**********";  // the root user of mysql 
mysqlD.password = "***********"; // the password of the root user in mysql
mysqlD.database = "***************"; // the databse to pick

// connect to the mysql database
conn = mysql_connection_setup(mysqlD);


CStringA query;
query.Format("select album from Artists where artist = '%s'", CT2CA(m_search_edit));
res = mysql_perform_query(conn, query);



//res = mysql_perform_query (conn, "select distinct artist from Artists");



while((row = mysql_fetch_row(res)) != NULL){
CString str;
UpdateData();

str = ("%s\n", row[0]);

UpdateData(FALSE);
m_list_control.AddString(str);

 }

The m_search_edit variable is the variable for an edit box. I am using Visual Studio 2008 with one copy of this program unicode and one nonunicode, I al开发者_运维百科so have a version built with VC++ 6. Any tips on how I can get output from the databse using the m_search_edit variable??