Does I 797 C notice mean selected in lottery ?

My employer showed me the I 797 C for my application. It shows the total amount received. I could not see if it had a receipt number. Does this mean my application got selected in the lottery for H1B ? Thanks.

I have also Received I-797c notice of action for amount received ($ 290) for H4. My employer has not received receipt number yet, So I am not sure If my lottery has been picked or not.

Yes, if H-4 has received their petition, then you have made through the lottery. Yours must be on its way.