Hi zilox!
One thing you can do it's to execute the function itsetf. This is a generic method when resolving APIs manually.
To do this you just put a memory BP on the .text section of system modules (kernel32, user32, ntdll, etc.) depending on what you think the API colud be.
Then, you use the "New origin here" on the first instruction of the API. When the program tries to execute the API, the BPM will trigger.
That's the idea...
cheers!