Msgbox for conflicting dates

I am trying to figure out how to make a message box display for a date if it is earlier than another date. These are for "Arrival" and "Departure" dates so I would like a message box to show if the departure date is before the arrival date (think that I'm hosting people, not sending them off :)). The dates are in text boxes on a user form. I only have a little bit of experience with VBA but I really enjoy using the program so I appreciate any help I can get!

I've tried this code:

[VBA]Option Explicit
Private Sub CmdBtn_Add_Click()
Dim DateDepart As Date
Dim DateArrive As Date
DateDepart = Txt_Depart.value
DateArrive = Txt_Arrive.value


If DateDepart.value < DateArrive.value Then
    MsgBox "Departure date is before arrival date", vbCritical, "Incompatible Departure Date"
    
Exit Sub
End If
End Sub[/VBA]

but I keep getting "Compile Error: Variable not defined."

I created a practice user form where I can get the following to work:

[VBA]Option Explicit
Private Sub CommandButton1_Click()
If TextBox1.value > TextBox2.value Then
MsgBox "Number is bigger!"


End If


End Sub[/VBA]

which works fine regardless of whether it is in a date format or not.

Still getting the issue of it saying that "Variable is not defined"

If I try this:

[VBA]Option Explicit
Private Sub Txt_Depart_AfterUpdate()
Dim textYear As Date
Dim textYear2 As Date


    textYear = CInt(Me.Txt_Arrival.value)
    textYear2 = CInt(Me.Txt_Depart.value)
    If textYear > textYear2 Then
        Msgbox "Departure date is before arrival date"


End If
    Exit Sub


End Sub[/VBA]

It says I get a type mismatch error. Am I setting up my variables wrong? Thank you for helping me with this!

Thank you! That did it! Slapped myself when I saw what the issue was