DateValue
Returns a Date Serial from a string
Syntax
`
Declare Function DateValue ( ByRef date_string As String ) As Double
`
Usage
`
#include "vbcompat.bi"
result = DateValue( date_string )
`
Parameters
`date_string`
the string to convert to a date serial
Return Value
Returns a Date Serial from a 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.
Example
`
#include "vbcompat.bi"
Dim As Integer 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 )
`
Differences from QB

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

See also

- Date Serials
- `DateSerial`
- `TimeValue`