Visual Basic's Built-in Functions Visual Basic has many built-in functions for manipulating text and carrying out mathematical operations, as well as the ability to format data in both standard and user-defined styles.
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The system's current date and time can be retrieved using the Now, Date and Time functions in Visual Basic. The Now function retrieves the date and time, while Date function retrieves only date and Time function retrieves only the time.
To display both the date and time together a message box is displayed use the statement given below.
MsgBox 'The current date and time of the system is' & Now
Here & is used as a concatenation operator to concentrate the string and the Now function. Selective portions of the date and time value can be extracted using the below listed functions.
Function | |
Year ( ) | Year (Now) |
Month ( ) | Month (Now) |
Day ( ) | Day (Now) |
WeekDay ( ) | WeekDay (Now) |
Hour ( ) | Hour (Now) |
Minute ( ) | Minute (Now) |
Second ( ) | Second (Now) |
The calculation and conversion functions related to date and time functions are listed below.
Function | |
DateAdd ( ) | Returns a date to which a specific interval has been added |
DateDiff ( ) | Returns a Long data type value specifying the interval between the two values |
DatePart ( ) | Returns an Integer containing the specified part of a given date |
DateValue ( ) | Converts a string to a Date |
TimeValue ( ) | Converts a string to a time |
DateSerial ( ) | Returns a date for specified year, month and day |
DateDiff Function
The DateDiff function returns the intervals between two dates in terms of years, months or days. The syntax for this is given below.
DateDiff (interval, date1, date2[, firstdayofweek[, firstweekofyear]])
Format Function
The format function accepts a numeric value and converts it to a string in the format specified by the format argument. The syntax for this is given below.
Format (expression[, format[, firstdayofweek[, firstweekofyear]]])
The Format function syntax has these parts:
Part | |
Expression | Required any valid expression |
format | Optional. A valid named or user-defined format expression. |
firstdayofweek | Optional. A contant that specifies the first day of the week. |
firstweekofyear | Optional. A contant that specifies the first week of the year |
More on Date and Time in Visual Basic 6
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