Exhibit 99
Exhibit A
Joint Filing Agreement
     In accordance with Rule 13d-l(k) promulgated under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them a Statement of Schedule 13G (including amendments thereto) with regard to the common stock of Microvision, Inc., a Delaware corporation, and further agree that this Joint Filing Agreement be included as an Exhibit to such joint filings. In evidence thereof, the undersigned, being duly authorized, hereby execute this Joint Filing Agreement as of May 21, 2009.
                 
 
               
    HIGHLAND CREDIT STRATEGIES FUND
 
               
 
      By:   /s/ James D. Dondero    
 
               
 
          James D. Dondero, President    
 
               
    Highland Capital Management, L.P.
 
               
    By: Strand Advisors, Inc., its general partner
 
               
 
      By:   /s/ James D. Dondero    
 
               
 
          James D. Dondero, President    
 
               
    Strand Advisors, Inc.
 
               
    By:   /s/ James D. Dondero    
             
        James D. Dondero, President    
 
               
    James D. Dondero    
 
               
    /s/ James D. Dondero