Datevalue

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DateValue

Returns the date serial for text written in the system's date format.

Syntax

Declare Function DateValue ( ByRef date_string As String ) As Long

Parameters

• date_string

Description

The date string must be in the format set in the regional settings of the Operating System.

DateValue( Date() ) will work correctly only if the regional settings specify the same short date format QB used (mm-dd-yyyy). Consider using the Now function in the expression Fix(Now()) to obtain the current date as a date serial.

The compiler will not recognize this function unless vbcompat.bi or datetime.bi is included.

Return Value

Returns a Date Serial from a date string.

Remarks

Usage

#include "vbcompat.bi"

result = DateValue( date_string )

Differences from QB

• Did not exist in QB. This function appeared in PDS and VBDOS

See also

• DateSerial
• TimeValue

Examples

#include "vbcompat.bi"

Dim As Long v1, v2

Dim As String  s1, s2

Print "Enter first date: ";

Line Input s1

If IsDate( s1 ) = 0 Then

  Print "not a date"

  End

End If

Print "Enter second date: ";

Line Input s2

If IsDate( s2 ) = 0 Then

  Print "not a date"

  End

End If

'' convert the strings to date serials

v1 = DateValue( s1 )

v2 = DateValue( s2 )

Print "Number of days between dates is " & Abs( v2 - v1 )

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Category: Date and Time Functions
Kind: function

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Reproduced from the FreeBASIC Wiki Manual under the GNU Free Documentation License 1.3 — with no Invariant Sections, no Front-Cover Texts and no Back-Cover Texts. Copyright © the FreeBASIC project and wiki contributors. See License.