Prevent a minimized window from restoring until a password is given

Problem/Question/Abstract:

I would like to have a password for windows I minimize. How can I write an application that will prevent any minimized window from restoring until a password is given?

Answer:

interface part:

bPassWordDialog: Boolean;
procedure WMSYSCOMMAND(var Msg: TWMSysCommand); message WM_SYSCOMMAND;
procedure WMActivate(var Msg: TWMActivate); message WM_ACTIVATE;

implementation part:

procedure TForm1.WMActivate(var Msg: TWMActivate);
begin
  if (Msg.Active = WA_Active) and (bPassWordDialog) then
  begin
    bPassWordDialog := False;
    ShowMessage('Show password dialog here');
  end;
  inherited;
end;

procedure TForm1.WMSYSCOMMAND(var Msg: TWMSysCommand);
begin
  bPassWordDialog := False;
  if Msg.CmdType = SC_MINIMIZE then
    bPassWordDialog := True;
  inherited;
end;