Build in Functions

IsNumeric Function
IsDate Function
Year Function
Date Function
Time Function

IsNumeric Function: Evaluates whether an expression can be converted to Date or Not.
Example:
Dim MyVar, MyCheck
MyVar = 53 ' Assigns a Numeric value.
MyCheck = IsNumeric(MyVar) ' Returns True.
MsgBox MyCheck
MyVar = "459.95" ' Assigns a String which consists of Number
MyCheck = IsNumeric(MyVar) ' Returns True.
MsgBox MyCheck
MyVar = "45 Help" ' Assigns a String.
MyCheck = IsNumeric(MyVar) ' Returns False.
MsgBox MyCheck

IsDate Function: Evaluates whether an expression is a number or not.
Example:
Dim MyDate, YourDate, NoDate
MyDate = "October 19, 1962": YourDate = #10/19/62#: NoDate = "Hello"
Msgbox "Value of MyDate is "&IsDate(MyDate)
Msgbox "Value of Your Date is "&IsDate(YourDate)
Msgbox "Value of NoDate variable is "&IsDate(NoDate)

Year Function: Returns the whole number representing an Year
Dim MyDate, MyYear
MyDate = #October 19, 1962# ' Assign a date.
MyYear = Year(MyDate) ' MyYear contains 1962.

Date Function: Returns the current system date.
MyDate = Date
Msgbox "Today's Date is "&MyDate

Time Function: Returns the current system time.
MyTime = Time
Msgbox "Current Time is "&MyTime