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 pickreplace()       Replace an item of a list
------------------------------------------------------------------------------
 Declaration
   pick.hdr

 Syntax
   func logical pickreplace extern
   param       _SLIST pList, ;
         value uint   uItem, ;
         const char   cString

 Arguments
   pList is the list to manipulate.
   uItem is the item to replace.
   cString is the new character string for the item.

 Return
   A logical indicating the success of operation.

 Description
   The pickreplace() function replaces the item at a given position
   of a list with a new string. The size of the list does not change.

   Note that the whole list is copied during the operation, the original list
   is cleared, and its pointer is replaced with the new list's pointer.
   This function can only be used with string lists, but not with generic
   lists that contain non-character data.

 Example
   #define EXAMPLE_LIST
   #include example.hdr

   proc Test_pickreplace
   vardef
      _SLIST pList
   enddef
   pList := ExampleList()
   ?
   pickreplace( pList, 4, "<<< This item is replaced >>>" ) // replace item
   ShowList( pList )
   pickclear( pList )
   endproc

   proc main
   Test_pickreplace()
   endproc