KeyDown/KeyPress/KeyUp with Enter

I have some problems with dealing with the enter key. The problem is this one:

I have a textbox in a form, and I want to send the information contained in the TextBox when the user presses enter while the TextBox has the focus.

I tried to use the KeyDown event to catch the Keys.Enter key, performing my stuff and setting args.Handled to true. The problem is that the bell rings every time I press Enter in the TextBox.

I am current using the KeyPress event to deal with it, performing my stuff when args.KeyChar =='\r'. What I am thinking is that on other platforms (like the ones with X in their names), this would not work since they are not using '\r' as their end-of-line character. Has anyone experience with this? Is this true? Is there a more portable way?

Thanks in advance

MrKoala