Issue while using ODBC drivers in C++ program

[SRK]

Hi,
I am trying to use ODBC on Unix platform. I have installed unixODBC
driver manager and mysql connector. When I try to use through command
line, unixODBC driver manager works fine, but when I write a code in C+
+ and try to run, it gives me connection error -

[unixODBC][Driver Manager]Data source name not found, and no default
driver specified

I have my .odbc.ini file in my home directory and I have even set
ODBCINI pointing to the .odbc.ini file, but still I am getting this
error.

Will greatly appriciate any reply on the same.

Thanks
Shiv