Show bullets in a TRichEdit

Problem/Question/Abstract:

How to show bullets in a TRichEdit?

Answer:

uses
RichEdit;

procedure TForm1.Button1Click(Sender: TObject);
var
fmt: TParaformat2;
begin
FillChar(fmt, SizeOf(fmt), 0);
fmt.cbSize := SizeOf(fmt);
// The PARAFORMAT2 structure is used to set the numbering style.
// This is done through the following structure members:
fmt.dwMask := PFM_NUMBERING or PFM_NUMBERINGSTART or PFM_NUMBERINGSTYLE or
PFM_NUMBERINGTAB;
// Set the following values (bitwise-or them together) to identify
// which of the remaining structure members are valid:
// PFM_NUMBERING, PFM_NUMBERINGSTART, PFM_NUMBERINGSTYLE, and PFM_NUMBERINGTAB
fmt.wNumbering := 2;
//0 no numbering or bullets
//1 (PFN_BULLET) uses bullet character
//2 Uses Arabic numbers (1, 2, 3, ...).
//3 Uses lowercase letters (a, b, c, ...).
//4 Uses uppercase letters (A, B, C, ...).
//5 Uses lowercase Roman numerals (i, ii, iii, ...).
//6 Uses uppercase Roman numerals (I, II, III, ...).
//7 Uses a sequence of characters beginning with the Unicode
//  character specified by the wNumberingStart member.
fmt.wNumberingStart := 1;
//  Starting value for numbering.
fmt.wNumberingStyle := $200;
// Styles for numbering:
// 0 : Follows the number with a right parenthesis.  1)
// $100 : Encloses the number in parentheses.       (1)
// $200 : Follows the number with a period.          1.
// $300 : Displays only the number.                  1
// $400 : Continues a numbered list without applying the next number or bullet.
// $8000 : Starts a new number with wNumberingStart.
fmt.wNumberingTab := 1440 div 4;
// Minimum space between a paragraph number and the paragraph text, in twips

RichEdit1.Perform(EM_SETPARAFORMAT, 0, lParam(@fmt));
end;