unit tapage;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics,
  Controls, Forms, Dialogs, ComCtrls;

type

  TAPageControl = class(TPageControl)
  private
    procedure CMDialogChar(var Msg: TCMDialogChar); message CM_DIALOGCHAR;
  end;

procedure Register;

implementation

procedure TAPageControl.CMDialogChar(var Msg: TCMDialogChar);
var
  i: Integer;
  S: string;
begin
  if Enabled then
    for I := 0 to PageCount - 1 do
      if IsAccel(Msg.CharCode, Pages[i].Caption) and
        Pages[I].TabVisible then
      begin
        Msg.Result := 1;
        ActivePage := Pages[I];
        Change;
        Exit; // выход из цикла.
      end;
  inherited;
end;

procedure Register;
begin
  RegisterComponents('Test', [TAPageControl]);
end;

end.