BMessage my_message; int32 my_int; if (my_message.FindInt32("my_int_value", &my_int) == B_OK) { // The integer value was successfully retrieved from the message. } else { // No integer value found with the specified key. }In this example, we create a BMessage object named "my_message" and then attempt to retrieve an integer with the key "my_int_value". If the integer value is found, it is stored in the "my_int" variable and the code within the if statement is executed. Otherwise, if no integer value is found with the specified key, the else statement is executed. Based on the syntax used and the BMessage object in use, it is safe to assume that this code is part of the BeOS/Haiku OS Application Kit library.