+ Cancel all the sent datagram that pass the selection criteria of ToCancel.\r
+ If ToCancel is NULL, all the datagrams are cancelled.\r
+\r
+ @param[in] UdpIo The UDP_IO to cancel packet.\r
+ @param[in] IoStatus The IoStatus to return to the packet owners.\r
+ @param[in] ToCancel The select funtion to test whether to cancel this\r
+ packet or not.\r
+ @param[in] Context The opaque parameter to the ToCancel.\r
+\r
+**/\r
+VOID\r
+EFIAPI\r
+UdpIoCancelDgrams (\r
+ IN UDP_IO *UdpIo,\r
+ IN EFI_STATUS IoStatus,\r
+ IN UDP_IO_TO_CANCEL ToCancel, OPTIONAL\r
+ IN VOID *Context\r
+ );\r
+\r
+/**\r
+ Creates a UDP_IO to access the UDP service. It creates and configures\r
+ a UDP child.\r
+\r
+ It locates the UDP service binding prototype on the Controller parameter\r
+ uses the UDP service binding prototype to create a UDP child (also known as\r
+ a UDP instance) configures the UDP child by calling Configure function prototype.\r
+ Any failures in creating or configuring the UDP child return NULL for failure.\r