Importing png sequence into the project inside c++ plugin

Dear AE plugin fellows,

At some point my plugin needs to insert png sequence as a top layer into the user project.

Suppose I have a path to the folder with png sequence: pic001.png, pic002.png and so on.

I need to import this png sequence into the user's project and have it inserted  right at the time where user time slider is positioned. (the png is going to be prepared with the fps equal to the fps of the project)

I scanned AE sdk and concluded that probably function AEIO_DrawSparseFrame

has something to do with the import,  but I'm still wandering in the dark. 

Do you know if it's possible in AE (or Premiere Pro)?

May be some working example or some link to the relevant thread inside the forum?

Yaroslav.