User Form to check data before closing form

I have a user form that when data entry is complete, I what to check that the values are correct. If they are not, I what the form to stay open, and messages to tell the user what to fix.

How should I write the code this is what I have, & I'm not getting what I need?

Private Sub Com_Apply_Click()
'chech values
    If Range("d15").Value > Range("d16").Value = True Then
    MsgBox "Alignment Start Station must be equal to or less then Alignment End Station"
    
    Else
    Unload Me
    End If
    
    If Range("d15").Value > Range("d16").Value = True Then
    MsgBox "Alignment End Station must be equal to or Greater then Alignment Start Station"
    
    Else
    Unload Me
    End If
    
    If Range("E16").Value > 0 = True Then
    MsgBox "Alignment Offset Left must be less then -0"
    
    Else
    Unload Me
    End If
    
    If Range("F17").Value > "0" = True Then
    MsgBox "Alignment Offset Left must be Greater then 0"
    
    Else
    Unload Me
    
    End If

End Sub

Why are you checking ranges?

Is this what you mean?

Private Sub Com_Apply_Click()
'chech values
    If Range("d15").Value > Range("d16").Value Then
        MsgBox "Alignment Start Station must be equal to or less then Alignment End Station"
        Exit Sub
    End If
    If Range("d15").Value > Range("d16").Value Then
        MsgBox "Alignment End Station must be equal to or Greater then Alignment Start Station"
        Exit Sub
    End If
    If Range("E16").Value > 0 Then
        MsgBox "Alignment Offset Left must be less then -0"
        Exit Sub
    End If
    If Range("F17").Value <= 0 Then
        MsgBox "Alignment Offset Left must be Greater then 0"
        Exit Sub
    End If
    Unload Me

What errors are you getting?

I think I need to see the workbook

Your Procedure was missing an End Sub

Private Sub Com_Apply_Click()
'chech values
    If Range("d15").Value > Range("d16").Value Then
        MsgBox "Alignment Start Station must be equal to or less then Alignment End Station"
        Exit Sub
    End If
    If Range("d15").Value > Range("d16").Value Then
        MsgBox "Alignment End Station must be equal to or Greater then Alignment Start Station"
        Exit Sub
    End If
    If Range("E16").Value > 0 Then
        MsgBox "Alignment Offset Left must be less then -0"
        Exit Sub
    End If
    If Range("F17").Value <= 0 Then
        MsgBox "Alignment Offset Left must be Greater then 0"
        Exit Sub
    End If
    Unload Me
    End Sub
'

To best describe or illustrate your problem you would be better off attaching a dummy workbook, the workbook should contain the same structure and some dummy data of the same type as the type you have in your real workbook - so, if a cell contains numbers & letters in this format abc-123 then that should be reflected in the dummy workbook. Don't upload a picture when you have a workbook question. None of us is inclined to recreate your data. Upload the workbook and manually add an 'after' situation so that we can see what you expect. In addition clearly explain how you get the results..
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