extract characters of a string

how to extract characters of a string like a VB function substr

  abc:string
  xyz:string;

abc:="This is demo");
xyz:=substr(abc,9,4);

then xyz = "demo"

adrianmakAsked:
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My name is MudSystems EngineerCommented:
Program CopySTR;
VAR
  abc: string;
  xyz: string;
Begin
  abc:="This is demo";
  xyz:=Copy(abc,9,4);
  Write(xyz);                            (*then xyz = "demo"*)
End.
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vikiingCommented:
(Besides that, that VB function you mention is MID$, not SUBSTR)...
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