by Abhinav Lal (1 Submission)
Category: Miscellaneous
Compatability: VB 6.0
Difficulty: Unknown Difficulty
Originally Published: Sat 16th April 2005
Date Added: Mon 8th February 2021
Rating: 
(1 Votes)
Validates the date in mm/dd/yyyy format
VBcoders
Dim flag As Integer
Dim dt As Variant
Dim isLeapYear As Boolean
' Date in mm/dd/yyyy format
dt = Split(mskDate, "/", -1, vbTextCompare)
If Val(dt(2)) <= 0 Or Val(dt(2)) > Year(Date) Then
flag = 3 ' Year out of valid range
Else
If Val(dt(0)) = 1 Or Val(dt(0)) = 3 Or Val(dt(0)) = 5 Or Val(dt(0)) = 7 Or Val(dt(0)) = 8 Or Val(dt(0)) = 10 Or Val(dt(0)) = 12 Then
' 31 day validation
If Val(dt(1)) <= 0 Or Val(dt(1)) > 31 Then
flag = 2 ' Date out of valid range
End If
ElseIf Val(dt(0)) = 4 Or Val(dt(0)) = 6 Or Val(dt(0)) = 9 Or Val(dt(0)) = 11 Or Val(dt(0)) = 8 Or Val(dt(0)) = 11 Then
' 30 day validation
If Val(dt(1)) <= 0 Or Val(dt(1)) > 30 Then
flag = 2 ' Date out of valid range
End If
ElseIf Val(dt(0)) = 2 Then
' February Error
' Checking for leap year
If (Val(dt(2)) Mod 4 <> 0) Then
isLeapYear = False
ElseIf (Val(dt(2)) Mod 400 = 0) Then
isLeapYear = True
ElseIf (Val(dt(2)) Mod 100 = 0) Then
isLeapYear = False
End If
If isLeapYear = True Then
If Val(dt(1)) <= 0 Or Val(dt(1)) > 29 Then
flag = 2 ' Date out of valid range
End If
Else
If Val(dt(1)) <= 0 Or Val(dt(1)) > 28 Then
flag = 2 ' Date out of valid range
End If
End If
ElseIf Val(dt(0)) <= 0 Or Val(dt(0)) > 12 Then
flag = 1 ' Month out of valid range
End If
End If
ValidateDate = flag
End Function
