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Tip of the Day
Language: Visual Basic
Expertise: Beginner
Apr 16, 1999



Building the Right Environment to Support AI, Machine Learning and Deep Learning

Ensure Foolproof Data Entry Times

Asking users to enter time values can often lead to problems formatting what the user enters. I use this piece of code to create a drop-down list of hours, minutes, and AM/PM, which ensures the user specifies the proper time and eliminates problems manipulating the time later in the program.

To use this example, create a combo-box array with three combo boxes: lower bound = 0; upper bound = 2; and a command button. Use this code:

Private Sub Form_Load()
	Dim i As Integer, strTemp As String

	'Fill hour combo box
	For i = 12 To 1 Step -1
		Combo1(0).AddItem i
	Next i

	'Fill minutes combo box
	For i = 0 To 59
		strTemp = i
		If Len(strTemp) = 1 Then strTemp = "0" & i
		Combo1(1).AddItem ":" & strTemp
	Next i

	'Fill AM/PM combo box
	Combo1(2).AddItem "AM"
	Combo1(2).AddItem "PM"

	'First item in each combo box is displayed
	For i = Combo1.LBound To Combo1.UBound
		Combo1(i).ListIndex = 0
	Next i
End Sub

Private Sub Command1_Click()
	Dim sTime

	'Format the time VB style
	sTime = "#" & Combo1(0) & Combo1(1) & ":00 " _
		& Combo1(2) & "#"
	MsgBox sTime
End Sub
Jason Natale
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