A Sub procedure is a series of Visual Basic statements enclosed by the Sub and End Sub statements that performs actions but doesn't return a value. A Sub procedure can take arguments, such as constants, variables, or expressions that are passed by a calling procedure. If a Sub procedure has no arguments, the Sub statement must include an empty set of parentheses.
The following Sub procedure has comments explaining each line.
' Declares a procedure named GetInfo ' This Sub procedure takes no arguments Sub GetInfo() ' Declares a string variable named answer Dim answer As String ' Assigns the return value of the InputBox function to answer answer = InputBox(Prompt:="What is your name?") ' Conditional If...Then...Else statement If answer = Empty Then ' Calls the MsgBox function MsgBox Prompt:="You did not enter a name." Else ' MsgBox function concatenated with the variable answer MsgBox Prompt:="Your name is " & answer ' Ends the If...Then...Else statement End If ' Ends the Sub procedure End Sub