Retrieve rows based on column names

[swetha muthineni]

I have a employee table "emp" described as,

Emp_Id varchar()
First_name varchar()
Last_name varchar()

I want to retrieve values of first_name and last_name with respect to emp_id.

I have written a query as,

dim str as string=Select first_name,last_name from emp where emp_id='H1';
dim ds as new dataset
dim da as new mysqldataadapter(str,con)
da.fill(ds,"emp")

Dim Fn,Ln as string,

Fn=ds.tables(0).rows(0)(0)
Ln=ds.tables(0).rows(0)(1)

I am getting the output perfectly, but i need to assign the values to FN,Ln not using the row & column index. I want to retrieve using column names.. Is it possible?