Passing Parameters
You can indicate whether an IFrame passes the entity name, type and entity instance ID to the target URL as shown in the following example. Note that it is best to use the entity name rather than the type code because the entity type code may be different between Microsoft CRM installations.
Example
Without parameters:
https://myAccountLookupApp.aspx
With parameters:
https://myserver/mypage.htm?type=1&typename=account&id={5E849F23-FEEF-DA11-A04F-00065B842569}