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C.3 Is Macromedia Flash Player installed?

 ; IsFlashInstalled
 ;
 ; By Yazno, http://yazno.tripod.com/powerpimpit/
 ; Returns on top of stack
 ; 0 (Flash is not installed)
 ; or
 ; 1 (Flash is installed)
 ;
 ; Usage:
 ;   Call IsFlashInstalled
 ;   Pop $R0
 ;   ; $R0 at this point is "1" or "0"

 Function IsFlashInstalled
  Push $R0
  ClearErrors
  ReadRegStr $R0 HKCR "CLSID\{D27CDB6E-AE6D-11cf-96B8-444553540000}" ""
  IfErrors lbl_na
    StrCpy $R0 1
  Goto lbl_end
  lbl_na:
    StrCpy $R0 0
  lbl_end:
  Exch $R0
 FunctionEnd

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