Code:

uses RichEdit;

procedure TForm1.Button1Click(Sender: TObject);

var

CF: TCharFormat;

begin

cf.cbSize := sizeof(cf);

cf.dwMask := CFM_OFFSET;

cf.yOffset := 70; // смещение по y; положительное/отрицательное для смещение верх/вниз

RichEdit1.Perform(EM_SETCHARFORMAT, SCF_SELECTION, integer(@cf));

end;

Code:

// yOffset values

type

  TCharacterFormat = (CFM_Superscript, CFM_Subscript, CFM_Normal);

procedure RE_SetCharFormat(RichEdit: TRichEdit; CharacterFormat: TCharacterFormat);

var

  // The CHARFORMAT structure contains information about

// character formatting in a rich edit control.

Format: TCharFormat;

begin

  FillChar(Format, SizeOf(Format), 0);

  with Format do

  begin

    cbSize := SizeOf(Format);

    dwMask := CFM_OFFSET;

    // Character offset, in twips, from the baseline.

   // If the value of this member is positive,

   // the character is a superscript;

   // if it is negative, the character is a subscript.

   case CharacterFormat of

      CFM_Superscript: yOffset := 60;

      CFM_Subscript: yOffset := -60;

      CFM_Normal: yOffset := 0;

    end;

  end;

  // The EM_SETCHARFORMAT message sets character formatting in a rich edit control.

// SCF_SELECTION: Applies the formatting to the current selection

Richedit.Perform(EM_SETCHARFORMAT, SCF_SELECTION, Longint(@Format));

end;

// Examples:

// Beispiele:

// Apply Superscript to the current selection

// Markierte Zeichen hoch stellen

procedure TForm1.Button1Click(Sender: TObject);

begin

  RE_SetCharFormat(RichEdit1, CFM_Superscript);

end;

// Apply Subscript to the current selection

// Markierte Zeichen tief stellen

procedure TForm1.Button2Click(Sender: TObject);

begin

  RE_SetCharFormat(RichEdit1, CFM_Subscript);

end;