Filter In Where Clause with Case Statement

Transact-SQL
1

I am trying to filter this but the "NOT IN" is erroring out.

WHERE  
	CASE WHEN Condition1 = 'Hello' THEN Field1 NOT IN ('ABC', 'DEF')
		ELSE 1		--SELECT Everything
	END	= 1
2

Nevermind, got it:

WHERE  
	CASE WHEN Condition1 = 'Hello' THEN 
		CASE WHEN Field1 IN ('ABC', 'DEF') THEN 0
			ELSE 1
		END
		
		ELSE 1		--SELECT Everything
	END	= 1
3 
WHERE  
	CASE WHEN Condition1 = 'Hello' AND Field1 NOT IN ('ABC', 'DEF')
         THEN 0 
         ELSE 1
	END	= 1
1 Like