vb 中怎样用deviceioctrol()？

我在VB中需要调用VXD服务为何老是不能成功，那位大狭帮帮我呀，有没有例程，谢谢？
 :cool:

要先声明DeviceIoControl函数呀。
Public Declare Function DeviceIoControl Lib \"kernel32\" Alias \"DeviceIoControl\" (ByVal hDevice As Long, ByVal dwIoControlCode As Long, lpInBuffer As Any, ByVal nInBufferSize As Long, lpOutBuffer As Any, ByVal nOutBufferSize As Long, lpBytesReturned As Long, lpOverlapped As OVERLAPPED) As Long
还有CreateFile、ClosHandle等。
直接和VxD打交道的事情用C写个dll，给VB用比较方便吧。