The OFFLINE function returns a value indicating whether or not the client application is in an off-line state. The function supports the Boolean and integral number return types. In a Boolean context, this function will return true of the client application is in an off-line state, and false if it is in an on-line state. In an integral number context, the function will return a non-zero value of the client application is in an off-line state, and zero if in an on-line state.