求教微软驱动例子中如何发送相应的Request

我刚刚开始学习驱动开发，参照微软网站https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/ucx-objects-and-handles-used-by-host-controller-driver页面写了一个USB的Demo，但是网站例程中关于发送Request的地方，都省略掉了。请教论坛各位大牛，帮忙分析一下，省略号部分的内容，需要如何写。实在搞不清楚如何完成这部分功能的


VOID
RootHub_EvtRootHubClearHubFeature(
    UCXROOTHUB         UcxRootHub,
    WDFREQUEST         ControlUrb
)

{


DbgTrace(TL_INFO, RootHub, "RootHub_EvtRootHubClearHubFeature");

WDF_REQUEST_PARAMETERS_INIT(&wdfRequestParams);
WdfRequestGetParameters(WdfRequest, &wdfRequestParams);
urb = (PURB)wdfRequestParams.Parameters.Others.Arg1;
setupPacket = (PWDF_USB_CONTROL_SETUP_PACKET)&urb->UrbControlTransferEx.SetupPacket[0];
...

WdfRequestComplete(ControlUrb, STATUS_SUCCESS);
}