USB通讯中定义的GUID
最近在做有关usb通讯方面的东西,有些东西搞不懂,还请大家的指点下。在通用模块中会定义一个GUID,
Public Type Guid
D1 As Long
D2 As Integer
D3 As Integer
D4(7) As Byte
End Type
Dim UsbGuid As Guid
If Not DeviceConnected Then
UsbGuid.D1 = &H5A8ED6A1
UsbGuid.D2 = &H7FC3
UsbGuid.D3 = &H4B6A
UsbGuid.D4(0) = &HA8
UsbGuid.D4(1) = &H36
UsbGuid.D4(2) = &H56
UsbGuid.D4(3) = &HDF
UsbGuid.D4(4) = &H35
UsbGuid.D4(5) = &HD0
UsbGuid.D4(6) = &H31
UsbGuid.D4(7) = &H48
现在想知道UsbGuid.D1~D4(7)的数值是什么意思?这几个数值是固定不变的吗?