Case Statement errors.

I keep getting errors on this Case Statement.  
here is my statement:

DECLARE @startdate varchar(10)
RP.Current_Run_Date = Select max(crtDate) from [Transaction]..NARRStatusHistory  
 THEN @startDate = RP.Previous_run_Date
from Reports.dbo.tblRpt_Param RP

Print '@startdate'

Server: Msg 156, Level 15, State 1, Line 2
Incorrect syntax near the keyword 'CASE'.
Server: Msg 156, Level 15, State 1, Line 5
Incorrect syntax near the keyword 'THEN'.

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declare @startDate datetime
SELECT @startDate = 
RP.Current_Run_Date = (Select max(crtDate) from [Transaction]..NARRStatusHistory)  
 THEN RP.Previous_run_Date
from Reports.dbo.tblRpt_Param RP

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Guy Hengel [angelIII / a3]Billing EngineerCommented:
what about this:

DECLARE @startdate datetime
DECLARE @maxdate datetime

SELECT @maxdate = max(crtDate) from [Transaction]..NARRStatusHistory  

SELECT @startdate =
CASE WHEN RP.Current_Run_Date = @maxdate
   THEN @startDate = RP.Previous_run_Date
FROM Reports.dbo.tblRpt_Param RP

Print @startdate
Forced accept.

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Query Syntax

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