backlash can't be restricted in input field

Does anybody know how to restrict the backslash in the input field?

I tried this code for my input text field named “myInputField” but you can still type the backslash:

// create input text field
_root.createTextField("myInputField", 1, 20, 20, 300, 20);
myInputField.type = "input";
myInputField.border = true;
// restrict backslash character
myInputField.restrict = "^\\";

Can someone tell me what I'm doing wrong here? Thanks.

Below is an fla with the backslash disabled.

Hmm... actually what I really wanted to do is to allow all characters including extended ASCII characters except for the backslash. So instead of a set of allowable characters I wanted to have a shorter set of restricted character(s).

Thanks though!