Eyes are the most effective sensory organ of communicating your curiosity in a woman. It is also the perfect way to win her over. While you are talking to the woman you are trying to woo, remember to look in to her eyes.Keep it in your mind that your vision should not wander around.
If you really want to reveal your interest and that too in a short notice, winking will be right idea to put across the message. A wink while smiling coyly is enough to make a woman go weak on her knees. Make sure your timing of winking is perfect. Avoid winking at her in the midst of a conversation.
If you do that, it will give a wrong impression of yours. It will simply mean that you are not lending your ears to what she's saying.
While you listen to her gaze at her naturally. Don't stare for long. Show some kind of expression while you listen to her.