API InCombatLockdown

Determines whether in-combat lockdown restrictions are active. inLockdown = InCombatLockdown

Returns

 * inLockdown : Flag - 1 if lockdown restrictions are currently in effect, nil otherwise.

Restrictions
While in combat:
 * Programatic modification of macros or bindings is not allowed.
 * Some things can't be done on "Protected" frames, their parents, or any frame they are anchored to. These include, but are not restricted to:
 * Hiding the frame using Hide widget method.
 * Showing the frame using Show widget method.
 * Changing the frame's attributes (custom attributes are used by Blizzard secure templates to set up their behavior).
 * Moving the frame by resetting frame's points or anchors (movements initiated by user are still allowed while in combat).