This is off the top of my head and likely isn't 100% complete and correct but should give you a general idea.
For each of these, create copies for the multiple devices, for example hidHandle, hidHandle2:
Private deviceNotificationHandle As IntPtr
Private exclusiveAccess As Boolean
Private hidHandle As SafeFileHandle
Private hidUsage As String
Private myDeviceDetected As Boolean
Private myDevicePathName As String
Private readHandle As SafeFileHandle
Private writeHandle As SafeFileHandle
Then you can either edit the FindTheHid routine to search for multiple devices or copy the routine (call it FindTheHid2) and search for a different device. In the routines that read and write to devices, use the handle, etc. for the device you want to communicate with.
Jan
