System.ComponentModel.MaskedTextResultHint
CharacterEscaped = 1
DigitExpected = -3
InvalidInput = -51
LetterExpected = -4
NoEffect = 2
NonEditPosition = -54
PositionOutOfRange = -55
PromptCharNotAllowed = -52
SideEffect = 3
SignedDigitExpected = -5
Success = 4
UnavailableEditPosition = -53
Unknown = 0