GUI component interaction: Difference between revisions
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=={{header|Visual Basic}}==
In VB, windows are usually created in the IDE. The generated code is hidden from the user unless viewed outside of VB. For the sake of this task, I have included that code.
Note that there are other methods of validating the entered value. The method used is dependant on the program's requirements.
<lang vb>VERSION 5.00
Begin VB.Form Form1
Caption = "Form1"
ClientHeight = 2265
ClientLeft = 60
ClientTop = 600
ClientWidth = 2175
LinkTopic = "Form1"
ScaleHeight = 2265
ScaleWidth = 2175
StartUpPosition = 3 'Windows Default
Begin VB.CommandButton cmdRnd
Caption = "Random"
Height = 495
Left = 120
TabIndex = 2
Top = 1680
Width = 1215
End
Begin VB.CommandButton cmdInc
Caption = "Increment"
Height = 495
Left = 120
TabIndex = 1
Top = 1080
Width = 1215
End
Begin VB.TextBox txtValue
Height = 495
Left = 120
TabIndex = 0
Text = "0"
Top = 240
Width = 1215
End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
'-----user-written code begins here; everything above this line is hidden in the GUI-----
Private Sub Form_Load()
Randomize Timer
End Sub
Private Sub cmdRnd_Click()
If MsgBox("Random?", vbYesNo) Then txtValue.Text = Int(Rnd * 11)
End Sub
Private Sub cmdInc_Click()
If Val(txtValue.Text) < 10 Then txtValue.Text = Val(txtValue.Text) + 1
End Sub
Private Sub txtValue_KeyPress(KeyAscii As Integer)
Select Case KeyAscii
Case 8, 43, 45, 48 To 57
'backspace, +, -, or number
Case Else
KeyAscii = 0
End Select
End Sub</lang>
{{omit from|PARI/GP}}
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