htaccess file in wp-admin folder issue

Hi, I’m using
SERVER TYPE: DESKTOP SERVER LOCAL HOST SETUP
I’m trying to place an htaccess.php file in the wp-admin folder. Each time I type “.htaccess.php,” I get the dialog that says, “YOU MUST TYPE A FILE NAME.” Once I click OK, the “.” goes away and only “htaccess.php” remains. How do I get the “.htaccess.php” file loaded? Thanks.