USB_ReadCtrlMsgAsync

function USB_ReadCtrlMsgAsync(

  fd: cint32;

  bmRequestType: cuint8;

  bmRequest: cuint8;

  wValue: cuint16;

  wIndex: cuint16;

  wLength: cuint16;

  rpData: pointer;

  cb: usbcallback;

  usrdata: pointer

):cint32;