VB 长整型和字节数组的转换问题 (Long<>Byte)

用到的API声明：
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As Any, Source As Any, ByVal Length As Long)

Long2Byte

Dim TempLng As Long
Dim TempBytes( 0 To 3 ) As Byte

TempLng = 2000

#If 方法1 Then
CopyMemory TempBytes( 0 ), TempLng, 4
#ElseIf 方法2 Then
TempBytes( 0 ) = TempLng And &HFF
TempBytes( 1 ) = (TempLng And &HFF00 &) \ &H100
TempBytes( 2 ) = (TempLng And &HFF0000 ) \ &H10000
TempBytes( 3 ) = (TempLng And &H7F000000 ) \ &H1000000 Or (((TempLng And &H80000000 ) <> 0 ) And &H80 )
#End If

Byte2Long

Dim l_byte( 0 To 3 ) As Byte '要被转化的Byte()
Dim l_long As Long '要保存转化的Long
l_byte( 0 ) = & 1F
l_byte( 1 ) = & 2F
l_byte( 2 ) = & 3F
l_byte( 3 ) = & 4F
l_long = "&H" & ( CStr (Hex(l_byte( 0 ))) & CStr (Hex(l_byte( 1 )))) & CStr (Hex(l_byte( 2 ))) & CStr (Hex(l_byte( 3 )))