Delphi InputBox进行密码输入？ [英] Delphi InputBox for password entry?

问题描述

输入框：

answer:=Inputbox('a','b','c');

功能很好，但我正在寻找一个蒙版的，像一个密码框，你只看到

works good, but I'm looking for a masked one, like a password box where you only see little stars instead of the typed characters.

推荐答案

您可以将Windows消息发送到由 InputBox ，这将标记编辑控件的密码输入。以下代码取自 http://www.swissdelphicenter.ch/en/showcode。 php？id = 1208 ：

You can send a Windows message to the edit control created by InputBox, that will flag the edit control for password entry. Code below taken from http://www.swissdelphicenter.ch/en/showcode.php?id=1208:

const
   InputBoxMessage = WM_USER + 200;

type
   TForm1 = class(TForm)
     Button1: TButton;
     procedure Button1Click(Sender: TObject);
   private
     procedure InputBoxSetPasswordChar(var Msg: TMessage); message InputBoxMessage;
   public
   end;

var
   Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.InputBoxSetPasswordChar(var Msg: TMessage);
var
   hInputForm, hEdit, hButton: HWND;
begin
   hInputForm := Screen.Forms[0].Handle;
   if (hInputForm <> 0) then
   begin
     hEdit := FindWindowEx(hInputForm, 0, 'TEdit', nil);
     {
       // Change button text:
       hButton := FindWindowEx(hInputForm, 0, 'TButton', nil);
       SendMessage(hButton, WM_SETTEXT, 0, Integer(PChar('Cancel')));
     }
     SendMessage(hEdit, EM_SETPASSWORDCHAR, Ord('*'), 0);
   end;
end;

procedure TForm1.Button1Click(Sender: TObject);
var
   InputString: string;
begin
   PostMessage(Handle, InputBoxMessage, 0, 0);
   InputString := InputBox('Input Box', 'Please Enter a Password', '');
end;

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