unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  WindowName: Integer;
  ProcessId: Integer;
  ThreadId: Integer;
  HandleWindow: Integer;
  Write: Cardinal;

implementation

{$R *.dfm}
procedure WriteProcessBytes(hProcess: THandle; Address: Pointer; const Buffer;
  Count: Integer); overload;
var
  NumberOfBytesWritten: DWORD;
begin
  if not WriteProcessMemory(hProcess, Address, @Buffer, SizeOf(Buffer),
    NumberOfBytesWritten) then RaiseLastOSError;
end;

procedure WriteProcessBytes(hProcess: THandle; Address: Pointer;
  const Buffer: Byte); overload;
begin
  WriteProcessBytes(hProcess, Address, Buffer, SizeOf(Buffer));
end;

procedure WriteProcessBytes(hProcess: THandle; Address: Pointer;
  const Buffer: Word); overload;
begin
  WriteProcessBytes(hProcess, Address, Buffer, SizeOf(Buffer));
end;

procedure WriteProcessBytes(hProcess: THandle; Address: Pointer;
  const Buffer: Cardinal); overload;
begin
  WriteProcessBytes(hProcess, Address, Buffer, SizeOf(Buffer));
end;


procedure TForm1.Button1Click(Sender: TObject);
begin
 WindowName := FindWindow(nil, 'Generic Property Editor Thingy');
 ThreadId := GetWindowThreadProcessId(WindowName, @ProcessId);
 HandleWindow := OpenProcess(PROCESS_ALL_ACCESS, False, ProcessId);
  WriteProcessBytes(HandleWindow, Pointer($449A17), Word(99));
 Closehandle(HandleWindow);
end;

end.