Using Inputbox As Password Entry?

i have been asked to make a form password entry but cant use a text box as it's opened from an MDI parent form so no main screen to speak of as such, my problem is at current the password works fine as shown below its basic stuff.

If InputBox("Please Enter Administration Password." _
, "Password Entry", "") = "trafficlight" Then
'Close current frmMDIChild and set the new form

[code]....

i want the input box to mask the characters been entered i know i could create my own input box and call that but is there a way to use the Default inputbox to mask the character input maybe watch the key presses saving input to a variable and displaying the asterix in its place? or am i overthinking it and there is a very easy solution like an inputbox that already masks input by a user.