How to load the Sharepoint list values into Infopath Form?

Question

Hi,

I have a sharepoint list with columns as "ItemID" and "ItemName".

And i have an Infopath Form with fields "myID" and "myname". If i enter some value in myID field, corresponding value from sharepoint list have to be appear in "myname" field.

I have iimplimented this without using custom code.It works but very slow and fire some alerts etc.,

So can any one pls post a sample code to achieve this.

Its an urgent requirement..pls

Thanks.