Microsoft KB Archive/171044
Article ID: 171044
Article Last Modified on 7/13/2007
- Microsoft Word 97 Standard Edition
This article was previously published under Q171044
To determine the number of days between two dates, using Visual Basic for Applications you can convert dates to serial numbers and subtract one number from the other.
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The following Visual Basic for Applications sample macro prompts for a date in the mm/dd/yy format, and returns the number of days between the current date and the specified date.
The DateValue() function converts a specified date, beginning with December 30, 1899, to a serial number.
x = DateValue("12/30/1899") ' returns 0 or zero x = DateValue("12/31/1899") ' returns 1 x = DateValue("12/5/1992") ' returns 33943
The Sgn() function is used to determine if the difference between two dates is a negative(date in the past) or positive(date in the future) number.
Sub DayDiff() Dim sDate As String Dim intNumDays As Integer On Error GoTo errhandler ' Prompt for a date. sDate = InputBox$("Enter a date in the mm/dd/yy format") ' Get difference between dates. intNumDays = CInt(DateValue(sDate) - Now()) ' Determine if difference is past or future. If Sgn(intNumDays) = 1 Then MsgBox "Days between " + sDate + " and today :" + CStr(intNumDays) Else MsgBox "The date " + sDate + " was" + CStr(Abs(intNumDays)) _ + " day(s) ago." End If errhandler: If Err > 0 Then MsgBox "Please enter a valid date." End Sub
For additional information, please see the following article in the Microsoft Knowledge Base:
173707 OFF97: How to Run Sample Code from Knowledge Base Articles
For more information about getting help with Visual Basic for Applications, please see the following article in the Microsoft Knowledge Base:
163435 VBA: Programming Resources for Visual Basic for Applications
Additional query words: vb vba vbe calculate difference
Keywords: kbdtacode kbhowto kbmacroexample KB171044