Displaying menu of dialog box

I have created a dialog box and have attached a menu to the dialog box. Is there is any way to display the menu immediately when the dialog box is invoked without the user clicking on the menu?

Code:

---

BOOL CMFDDLGDlg::OnInitDialog()
{
  ...

  PostMessage(WM_SYSCOMMAND, SC_KEYMENU, 'F');

  ...
}

---

Where "F" is the Mnemonic of the menu item, in my case It is &File. So if you want to show the &Help, place 'H' in the lParam.

Hope this will help you