Connecting Oracle to code::blocks

Question

I tried to connect a C++ program in codeblocks IDE to Oracle database.
For that, I downloaded an API named SQLAPI. I took a given example in that API folder
and compiled and linked the appropriate files.

The code is :

#include <stdio.h>  // for printf
#include <SQLAPI.h> // main SQLAPI++ header
int main(int argc, char* argv[])
{
SAConnection con; // create connection object

try
{
    // connect to database
    // in this example it is Oracle,
    // but can also be Sybase, Informix, DB2
    // SQLServer, InterBase, SQLBase and ODBC
    con.Connect(
        "XE",     // database name
        "system",   // user name
        "system",   // password
        SA_Oracle_Client);

    printf("We are connected!\n");

    // Disconnect is optional
    // autodisconnect will ocur in destructor if needed
    con.Disconnect();

    printf("We are disconnected!\n");
}
catch(SAException &x)
{
    // SAConnection::Rollback()
    // can also throw an exception
    // (if a network error for example),
    // we will be ready
    try
    {
        // on error rollback changes
        con.Rollback();
    }
    catch(SAException &)
    {
    }
    // print error message
    //printf("%s\n", (const char*)x.ErrText());
}

return 0;
}  

But when I run this program, I get following message :
"This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information."

Why this message is coming?