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)
    Memo1: TMemo;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
 
var
  Form1: TForm1;
 
implementation
 
{$R *.dfm}
 
procedure TForm1.Button1Click(Sender: TObject);
var
  a, b: PAnsiChar;
  h: HWND;
begin
  h := FindWindow(nil, 'x64dbg');
  h := FindWindowEx(h, 0, 'Qt5QWindowIcon1', nil);
  SendMessage(h, WM_SETTEXT, 255, Integer(PChar('我来测了')));
end;
 
end.

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