unit Unit1;
 
interface
 
uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants,
  System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs,
  Vcl.StdCtrls;
 
type
  TForm1 = class(TForm)
    Button1: TButton;
    Edit1: TEdit;
    Memo1: TMemo;
    ListBox1: TListBox;
    CheckBox1: TCheckBox;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
 
var
  Form1: TForm1;
 
implementation
 
{$R *.dfm}
 
procedure SplitTextIntoWords(const S: string; words: TStringList);
var
  startpos, endpos: Integer;
begin
  Assert(Assigned(words));
  words.Clear;
  startpos := 1;
  while startpos <= Length(S) do
  begin
    while (startpos <= Length(S)) and not IsCharAlpha(S[startpos]) do
      Inc(startpos);
    if startpos <= Length(S) then
    begin
      endpos := startpos + 1;
      while (endpos <= Length(S)) and IsCharAlpha(S[endpos]) do
        Inc(endpos);
      words.Add(Copy(S, startpos, endpos - startpos));
      startpos := endpos + 1;
    end;
  end;
end;
 
function StringMatchesMask(S, mask: string;
  case_sensitive: Boolean): Boolean;
var
  sIndex, maskIndex: Integer;
begin
  if not case_sensitive then
  begin
    S    := AnsiUpperCase(S);
    mask := AnsiUpperCase(mask);
  end; { If }
  Result    := True; // blatant optimism
  sIndex    := 1;
  maskIndex := 1;
  while (sIndex <= Length(S)) and (maskIndex <= Length(mask)) do
  begin
    case mask[maskIndex] of
      '?':
        begin
          Inc(sIndex);
          Inc(maskIndex);
        end; { case '?' }
      '*':
        begin
          Inc(maskIndex);
          if maskIndex > Length(mask) then
            Exit
          else if mask[maskindex] in ['*', '?'] then
            raise Exception.Create('Invalid mask');
          while (sIndex <= Length(S)) and
            (S[sIndex] <> mask[maskIndex]) do
            Inc(sIndex);
          if sIndex > Length(S) then
          begin
            Result := False;
            Exit;
          end;
 
        end; { Case '*' }
      else if S[sIndex] = mask[maskIndex] then
        begin
          Inc(sIndex);
          Inc(maskIndex);
        end
        else
          begin
            Result := False;
            Exit;
          end;
    end;
  end;
  if (sIndex <= Length(S)) or (maskIndex <= Length(mask)) then
    Result := False;
end;
 
procedure FindMatchingWords(const S, mask: string;
  case_sensitive: Boolean; matches: Tstrings);
var
  words: TstringList;
  i: Integer;
begin
  Assert(Assigned(matches));
  words := TstringList.Create;
  try
    SplitTextIntoWords(S, words);
    matches.Clear;
    for i := 0 to words.Count - 1 do
    begin
      if stringMatchesMask(words[i], mask, case_sensitive) then
        matches.Add(words[i]);
    end; { For }
  finally
    words.Free;
  end;
end;
{
The Form has one TMemo for the text to check, one TEdit for the mask,
one TCheckbox (check = case sensitive), one TListbox for the results,
one Tbutton
}
 
{ Coloque um form com um TMemo, um edit para a palavra procurada, um checkbox
para o case sensitive e um listbox para os resultados }
 
procedure TForm1.Button1Click(Sender: TObject);
begin
  FindMatchingWords(memo1.Text, edit1.Text, checkbox1.Checked, listbox1.Items);
end;
 
 
end.