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只发控制不发数据,这样可以吗
buildvenderrequest函数定义如下
PURB BuildVendorRequest( PUCHAR TransferBuffer, ULONG TransferBufferLength, UCHAR RequestTypeReservedBits, UCHAR Request, USHORT Value, BOOLEAN bIn=FALSE, BOOLEAN bShortOk=FALSE, PURB Link=NULL UCHAR Index=0, USHORT Function=URB_FUNCTION_VENDOR_DEVICE, PURB pUrb=NULL ); 那么如果我只发控制不发数据,前三个参数应该设置成null,0,0,是吗? |
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