In the Q3 source it is used twice - once on level load and in G_Spawn where it is called whenever an entity is created.

This function has no parameters.

Returns a bitmask representing active key catchers.

Bitmask values are:

• KEYCATCH_CONSOLE
• KEYCATCH_UI
• KEYCATCH_MESSAGE
• KEYCATCH_CGAME

To check if CGAME key-catching is active:

    if (trap_Key_GetCatcher() & KEYCATCH_UI) {
        /* happy happy */
    }

trap_Key_SetCatcher

PhaethonH