Is there an official API method or property to determine if a control is "dirty"?

[amtopel]

Is there any official API way of determining whether the user has modified the value of a control--i.e., whether the control is "dirty"? For example, the Win32 edit control has the EM_GETMODIFY message, which indicates whether the contents of the edit control have been modified. Is there anything equivalent in WinUI? And if not, could that be a possible future feature? Maybe a property like IsDirty()?