+/**\r
+ Return the index of the load option in the load option array.\r
+\r
+ The function consider two load options are equal when the \r
+ OptionType, Attributes, Description, FilePath and OptionalData are equal.\r
+\r
+ @param Key Pointer to the load option to be found.\r
+ @param Array Pointer to the array of load options to be found.\r
+ @param Count Number of entries in the Array.\r
+\r
+ @retval -1 Key wasn't found in the Array.\r
+ @retval 0 ~ Count-1 The index of the Key in the Array.\r
+**/\r
+INTN\r
+EFIAPI\r
+EfiBootManagerFindLoadOption (\r
+ IN CONST EFI_BOOT_MANAGER_LOAD_OPTION *Key,\r
+ IN CONST EFI_BOOT_MANAGER_LOAD_OPTION *Array,\r
+ IN UINTN Count\r
+ );\r
+\r