Password Console VB (loop)?

So the user enters a password to get into the system, i am just using VB code, no importing anything else. This is what i have so far, i got it so when a key is pressed it adds it to the variable and then displays an asterisc, just wondering how i would get it to remove the last character entered and the asterisc when the backspace is pressed Do Until count = 3 Or password = pass 'so the loop only goes around 3 times

count = count + 1 'this adds one on so the loop knows when it is 3
Console.Write(vbTab & vbTab & "Enter Password : ")
Do
info = Console.ReadKey(True) 'takes the key and puts it to the info variable

[code].....