qa.hlp (Table of Contents; Topic list)
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Int 21H Function 3BH
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▀ The function fails if any element of the pathname does not exist.
 
▀ Int 21H Function 47H can be used to obtain the name of the current direc-
  tory before using Int 21H Function 3BH to select another so that the orig-
  inal directory can be restored later.
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