Hey Merkaber,
I think you are searching for this:
If so, I would recommend having a look at the Runtime Mesh Component PlugIn which is a faster version of the previous link.
To spawn “MyActor” directly from c++ use:
AMyActor *pointerToYourObject = GetWorld()->SpawnActor<AMyActor>(AMyActor::StaticClass(), FVector location, FRotator rotation, FActorSpawnParameters spawnParameters);