String pdf="file.pdf";
            String bf ="file.exe";
            String if ="file.png";
        	
	    //how to load Files to save in mysql?;
            
            sql.Begin();
            String st="INSERT INTO test ";
            st += "(PDF,BF,IF)";
            st += " values (?,?,?)";  
            sql.Execute ( , , );
            sql.Commit();


            String st="select * from test ";
            sql.Execute (st);
            while ( sql.Fetch() )
            {
                ? SQL["PDF"]
                ? SQL["BF"]
                ? SQL["IF"]	
             }            

            //how to write content in files ?
              SaveFile(fpdf,?); 
              SaveFile(fbf,?); 
              SaveFile(fif,?); 

//it may be necessary to increase mysql limits in the "my.ini" file, it was my situation because I tested a 23mb file

max_allowed_packet = 64M or (1073741824)
and
innodb_log_file_size=255M

	    String f="testeOrig.pdf";
	    String f2="testeDest.pdf";
	    String s=LoadFile(f);
	    String str=Base64Encode(s); 
	
            sql.Begin();
            String st="INSERT INTO test ";
            st += "(ID,TEXT,BF)";
            st += " values (?,?,?)";  
            sql.Execute (st,1,AsString(2),str);
            sql.Commit();
               
            Value v;
            String st="select * from test ";
            sql.Execute (st);
            while ( sql.Fetch() )
            {
	        v  = AsString ( sql["BF"] );
	    }
        
            String str=Base64Decode(v); 
            SaveFile(f2,str);