This trigger takes an ID number as a required suffix. It returns the number of projectiles currently owned by the player and having the specified ID number.

Format: NumProjID[ID]

Arguments:

- [ID]: Required ID number.

Return type: int

Error conditions: If a negative ID is specified, then the ID defaults to 0.

Example:

`trigger1 = NumProjID1234 = 1
; Triggers if there the player currently owns exactly 1 projectile with the ID number 1234.`