[tango01]

siguiento con el tema de los inputBox, hice uno que es un inputPassBox, que te devuelve un string al igual que el inputBox, pero tiene el passwordChar ='*', asi que sirve para el ingreso de contraseñas.

aqui paso la unit uVarios.pass con el inputMemoBox y el inputPassBox

unit uVarios;

interface

uses
forms,StdCtrls,Windows,Dialogs,Graphics, Consts, Controls;

function InputMemoBox(const ACaption, APrompt, ADefault: string): string;
function InputMemoQuery(const ACaption, APrompt: string;
  var Value: string): Boolean;

function InputPassBox(const ACaption, APrompt, ADefault: string): string;
function InputPassQuery(const ACaption, APrompt: string;
  var Value: string): Boolean;

implementation

function GetAveCharSize(Canvas: TCanvas): TPoint;
var
  I: Integer;
  Buffer: array[0..51] of Char;
begin
  for I := 0 to 25 do Buffer[i] := Chr(I + Ord('A'));
  for I := 0 to 25 do Buffer[I + 26] := Chr(I + Ord('a'));
  GetTextExtentPoint(Canvas.Handle, Buffer, 52, TSize(Result));
  Result.X := Result.X div 52;
end;

function InputMemoQuery(const ACaption, APrompt: string;
  var Value: string): Boolean;
var
  Form: TForm;
  Prompt: TLabel;
  memo: TMemo;
  DialogUnits: TPoint;
  ButtonTop, ButtonWidth, ButtonHeight: Integer;
begin
  Result := False;
  Form := TForm.Create(Application);

  with Form do
    try
      Canvas.Font := Font;
      DialogUnits := GetAveCharSize(Canvas);
      BorderStyle := bsDialog;
      Caption := ACaption;
      ClientWidth := MulDiv(180, DialogUnits.X, 4);
      Position := poScreenCenter;
      Prompt := TLabel.Create(Form);
      with Prompt do
      begin
        Parent := Form;
        Caption := APrompt;
        Left := MulDiv(8, DialogUnits.X, 4);
        Top := MulDiv(8, DialogUnits.Y, 8);
        Constraints.MaxWidth := MulDiv(164, DialogUnits.X, 4);
        WordWrap := True;
      end;
      memo := TMemo.Create(form);
      with memo do
      begin
        Parent := Form;
        Left := Prompt.Left;
        Top := Prompt.Top + Prompt.Height + 5;
        Width := MulDiv(164, DialogUnits.X, 4);
        MaxLength := 255;
        Text := Value;
        SelectAll;
      end;
      ButtonTop := memo.Top + memo.Height + 15;
      ButtonWidth := MulDiv(50, DialogUnits.X, 4);
      ButtonHeight := MulDiv(14, DialogUnits.Y, 8);
      with TButton.Create(Form) do
      begin
        Parent := Form;
        Caption := SMsgDlgOK;
        ModalResult := mrOk;
        Default := True;
        SetBounds(MulDiv(38, DialogUnits.X, 4), ButtonTop, ButtonWidth,
          ButtonHeight);
      end;
      with TButton.Create(Form) do
      begin
        Parent := Form;
        Caption := SMsgDlgCancel;
        ModalResult := mrCancel;
        Cancel := True;
        SetBounds(MulDiv(92, DialogUnits.X, 4), memo.Top + memo.Height + 15,
          ButtonWidth, ButtonHeight);
        Form.ClientHeight := Top + Height + 13;
      end;
      if ShowModal = mrOk then
      begin
        Value := memo.Text;
        Result := True;
      end;
    finally
      Form.Free;
    end;
end;
function InputMemoBox(const ACaption, APrompt, ADefault: string): string;
begin
  Result := ADefault;
  InputMemoQuery(ACaption, APrompt, Result);
end;

function InputPassBox(const ACaption, APrompt, ADefault: string): string;
begin
  Result := ADefault;
  InputPassQuery(ACaption, APrompt, Result);
end;

function InputPassQuery(const ACaption, APrompt: string;
  var Value: string): Boolean;
var
  Form: TForm;
  Prompt: TLabel;
  Edit: TEdit;
  DialogUnits: TPoint;
  ButtonTop, ButtonWidth, ButtonHeight: Integer;
begin
  Result := False;
  Form := TForm.Create(Application);
  with Form do
    try
      Canvas.Font := Font;
      DialogUnits := GetAveCharSize(Canvas);
      BorderStyle := bsDialog;
      Caption := ACaption;
      ClientWidth := MulDiv(180, DialogUnits.X, 4);
      Position := poScreenCenter;
      Prompt := TLabel.Create(Form);
      with Prompt do
      begin
        Parent := Form;
        Caption := APrompt;
        Left := MulDiv(8, DialogUnits.X, 4);
        Top := MulDiv(8, DialogUnits.Y, 8);
        Constraints.MaxWidth := MulDiv(164, DialogUnits.X, 4);
        WordWrap := True;
      end;
      Edit := TEdit.Create(Form);
      with Edit do
      begin
        Parent := Form;
        Left := Prompt.Left;
        Top := Prompt.Top + Prompt.Height + 5;
        Width := MulDiv(164, DialogUnits.X, 4);
        MaxLength := 255;
        PasswordChar := '*';
        Text := Value;
        SelectAll;
      end;
      ButtonTop := Edit.Top + Edit.Height + 15;
      ButtonWidth := MulDiv(50, DialogUnits.X, 4);
      ButtonHeight := MulDiv(14, DialogUnits.Y, 8);
      with TButton.Create(Form) do
      begin
        Parent := Form;
        Caption := SMsgDlgOK;
        ModalResult := mrOk;
        Default := True;
        SetBounds(MulDiv(38, DialogUnits.X, 4), ButtonTop, ButtonWidth,
          ButtonHeight);
      end;
      with TButton.Create(Form) do
      begin
        Parent := Form;
        Caption := SMsgDlgCancel;
        ModalResult := mrCancel;
        Cancel := True;
        SetBounds(MulDiv(92, DialogUnits.X, 4), Edit.Top + Edit.Height + 15,
          ButtonWidth, ButtonHeight);
        Form.ClientHeight := Top + Height + 13;
      end;
      if ShowModal = mrOk then
      begin
        Value := Edit.Text;
        Result := True;
      end;
    finally
      Form.Free;
    end;
end;
end.