Spawning entity by pressing a key?

[The chaser]

Aaaaw, this is an old-school script! Here:

void OnStart() //Or you can put the following stuff in OnEnter()
{
SetEntityCallbackFunc("YOUR_KEY", "OnPickup");
}

void OnPickup(string &in asEntity, string &in type)
{
SetEntityActive("YOURENTITY", true);
}

/////OR YOU CAN USE

void OnPickup(string &in asEntity, string &in type)
{
CreateEntityAtArea("Your_entity_name", "ENTITY.ENT", "AREATOBESPAWNEDATNAME", false);
}

EDIT: Oh my god, I misread your post... spawning an entity pressing a keyboard key... nope, nothing that I know of.