Adding a new row is very simple. Start the definition of the new dataset with the command hk_datasource::setmode_insertrow() and end it with the already well known method mydatasource->store_changed_data();. Between these two methods set the values for each column with the method hk_column::set_asstring(const string&). You have to create hk_column objects for every column (=field) you want to add data.
Example 6.1. Add a row
#define HAVE_SSTREAM 1
#include <hk_classes.h>
#include <iostream>
int main()
{
hk_drivermanager* mydrivermanager = new hk_drivermanager();
if (mydrivermanager==NULL) {cout <<"error creating mydrivermanager"<<endl;exit(1);}
hk_connection* myconnection = mydrivermanager->new_connection("mysql");
if (myconnection==NULL) {cout <<"error creating myconnection"<<endl;exit(1);}
myconnection->set_host("localhost");
myconnection->set_user("root");
myconnection->set_password("mypasswd");
myconnection->connect();
hk_database* mydatabase=myconnection->new_database("exampledb");
if (mydatabase==NULL) {cout <<"error creating mydatabase"<<endl;exit(1);}
hk_datasource* mydatasource= mydatabase->new_table("authors");
if (mydatasource==NULL) {cout <<"error creating mydatasource"<<endl;exit(1);}
mydatasource->enable();
hk_column* mycolumn = mydatasource->column_by_name("name");
if (mycolumn==NULL) {cout <<"error getting column"<<endl;exit(1);}
mydatasource->setmode_insertrow();
mycolumn->set_asstring("Fontane, Theodor");
mydatasource->store_changed_data();
delete mydrivermanager;
}