Convert HDAM to PHDAM.

Hi All,
One of DBD in my application wants to convert only access HDAM to PHDAM rest is same.Just i need a clarification do i need modify in the exisitng programs who is using the same DBD.
One of DBD in my application wants to convert only access HDAM to PHDAM rest is same.Just i need a clarification do i need modify in the exisitng programs who is using the same DBD.