WPF PasswordBox: How do I warn a user that Caps Lock is enabled?

Question

Does anyone know how to implement the standard bubble message that warns users whenever Caps Lock is enabled and a password control has focus? Is this built into the .NET framework, or do I need to write my own class to do this?

Answer 1

This is an old question, and already answered, but I came across this same problem and I first started with Keyboard.IsKeyToggled(Key.CapsLock) but that returned false if Caps Lock was set prior to the application running. So I found another solution that works perfectly.

Console.CapsLock //is boolean and returns true if CapsLock is on

Absolutely brilliant and simple (it's in the mscorlib dll so you don't have to worry about unneeded dependencies either)

Answer 2

You could add a handler function to the PasswordChanged event handler and test for the value of the CapsLock key in that function. If found to be on, you could pop-up a message from there.

Answer 3

If you use a MaskedTextBox and specify a passwordChar the .NET framework will automatically do this for you