...set the paragraph line spacing in a TRichedit?

uses
  RichEdit;

procedure RE_SetLineSpacing(ARichEdit: TRichEdit; lineSpacing: Byte);
var
  pf2: ParaFormat2;
begin
  FillChar(pf2, SizeOf(pf2), 0);
  pf2.cbSize := SizeOf(PARAFORMAT2);
  pf2.dwMask := PFM_LINESPACING;
  pf2.bLineSpacingRule := lineSpacing;
  SendMessage(ARichEdit.Handle, EM_SETPARAFORMAT, 0, Longint(@pf2));
end;

//Example: Setlinespacing to 1:
procedure TForm1.Button1Click(Sender: TObject);
begin
  RE_SetLineSpacing(RichEdit1, 1);
end;

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