Get statement - Please help me understand how this works

As an example, opening a Jpeg, results in FFD8 FFE1 (which is correct - that's the magic number for a jpeg) for both methods

    Dim strFullName As String
    Dim intFNum As Integer
    Dim lngReadPos As Long, x As Long
    Dim BytGetHeader As Byte

    Dim avarBuffer As Variant
    Dim lngGetHeader2 As Long

    Dim hxValue As String

    'user prompted to pick file
    strFullName = fnstrFilePicker
    If Len(strFullName) > 0 Then
    Else
        MsgBox "You cancelled!"
        Exit Sub
    End If

    'method 1
    intFNum = FreeFile()
    Open strFullName For Binary Access Read Lock Write As intFNum
    lngReadPos = 1
    For x = 1 To 4
        Get #intFNum, x, BytGetHeader
        hxValue = hxValue & Hex(BytGetHeader)
    Next x
    Close #intFNum

    Debug.Print "Method 1: Header = " & hxValue


    'method 2
    hxValue = ""
    avarBuffer = fnavarUseFileOpenToCreateBufferArr(strFullName)
    For x = 0 To 3
        hxValue = hxValue & Hex(avarBuffer(x))
    Next x
    Debug.Print "Method 2: Header = " & hxValue

Using a long in the same scenario results in -503326465, which has a hex value of FFFF FFFF E1FF D8FF