WD97: Macro to Determine the Number of Days in a Specified Month

ID: Q171128

The information in this article applies to:

Microsoft Word 97 for Windows

SUMMARY

This article contains a sample Microsoft Visual Basic for Applications macro that determines the number of days in a specified month.

MORE INFORMATION

Microsoft provides programming examples for illustration only, without warranty either expressed or implied, including, but not limited to, the implied warranties of merchantability and/or fitness for a particular purpose. This article assumes that you are familiar with the programming language being demonstrated and the tools used to create and debug procedures. Microsoft support professionals can help explain the functionality of a particular procedure, but they will not modify these examples to provide added functionality or construct procedures to meet your specific needs. If you have limited programming experience, you may want to contact the Microsoft fee-based consulting line at (800) 936-5200. For more information about the support options available from Microsoft, please see the following page on the World Wide Web:

   http://www.microsoft.com/support/supportnet/refguide/

The following macro prompts for a date in mm/dd/yy format and prints the number of days in the specified month in a message box.

   Sub Date_NumDaysInMonth()
      Dim iMon As Integer
      Dim sDate As String
   PromptForDate:
      sDate = InputBox("Enter a date in the mm/dd/yyyy format")
      ' If Cancel was pressed, end macro.
      If sDate = "" Then Exit Sub
      ' If Date entered is not a valid date, display message.
      If Not IsDate(sDate) Then
         MsgBox "Please enter a valid date."
         GoTo PromptForDate
      End If
      ' The Month function returns the month number (1-12) of the date.
      Select Case Month(sDate)
         Case 4, 6, 9, 11
            sNumDays = "30"
         Case 2
            If Year(sDate) Mod 4 = 0 Then
               sNumDays = "29"
            Else
               sNumDays = "28"
            End If
         Case Else
            sNumDays = "31"
      End Select
      MsgBox Format$(sDate, "mmmm") & " of " & Format$(sDate, "yyyy") _
         & " has " & sNumDays & " days."
   End Sub

The macro takes leap years into consideration when computing the number of days in February. For example, this routine divides the year by 4 and if the remainder is 0, there are 29 days in February of the year specified. Otherwise, there are 28 days in February of the year specified.

For additional information, please see the following article in the Microsoft Knowledge Base:

   ARTICLE-ID: Q173707
   TITLE     : OFF97: How to Run Sample Code from Knowledge Base Articles

REFERENCES

For more information about getting help with Visual Basic for Applications, please see the following article in the Microsoft Knowledge Base:

   ARTICLE-ID: Q163435
   TITLE     : VBA: Programming Resources for Visual Basic for
               Applications

Additional query words: wordcon vb vba vbe

Keywords          : kbcode kbdta kbdtacode kbmacroexample word8 kbwordvba word97 
Version           : 97
Platform          : WINDOWS
Issue type        : kbhowto

Last Reviewed: April 3, 1999