本文整理汇总了VB.NET中System.Windows.Forms.Control.HelpRequested事件的典型用法代码示例。如果您正苦于以下问题:VB.NET Control.HelpRequested事件的具体用法?VB.NET Control.HelpRequested怎么用?VB.NET Control.HelpRequested使用的例子?那么恭喜您, 这里精选的事件代码示例或许可以为您提供帮助。
在下文中一共展示了Control.HelpRequested事件的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: Form1
' 导入命名空间
Imports System.Drawing
Imports System.Windows.Forms
Public Class Form1
Inherits System.Windows.Forms.Form
Private WithEvents addressTextBox As System.Windows.Forms.TextBox
Private WithEvents label2 As System.Windows.Forms.Label
Private WithEvents cityTextBox As System.Windows.Forms.TextBox
Private WithEvents label3 As System.Windows.Forms.Label
Private WithEvents stateTextBox As System.Windows.Forms.TextBox
Private WithEvents zipTextBox As System.Windows.Forms.TextBox
Private WithEvents helpLabel As System.Windows.Forms.Label
<STAThread()> _
Shared Sub Main()
Application.Run(New Form1)
End Sub
Public Sub New()
Me.addressTextBox = New System.Windows.Forms.TextBox
Me.helpLabel = New System.Windows.Forms.Label
Me.label2 = New System.Windows.Forms.Label
Me.cityTextBox = New System.Windows.Forms.TextBox
Me.label3 = New System.Windows.Forms.Label
Me.stateTextBox = New System.Windows.Forms.TextBox
Me.zipTextBox = New System.Windows.Forms.TextBox
' Help Label
Me.helpLabel.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
Me.helpLabel.Location = New System.Drawing.Point(8, 80)
Me.helpLabel.Size = New System.Drawing.Size(272, 72)
Me.helpLabel.Text = "Click on any control to give it focus, and then " & _
"press F1 to display help for that" + " control. Alternately, you can " & _
"click the help button at the top of the dialog and then click on a control."
' Address Label
Me.label2.Location = New System.Drawing.Point(16, 8)
Me.label2.Size = New System.Drawing.Size(100, 16)
Me.label2.Text = "Address:"
' Comma Label
Me.label3.Location = New System.Drawing.Point(136, 56)
Me.label3.Size = New System.Drawing.Size(16, 16)
Me.label3.Text = ","
' Address TextBox
Me.addressTextBox.Location = New System.Drawing.Point(16, 24)
Me.addressTextBox.Size = New System.Drawing.Size(264, 20)
Me.addressTextBox.TabIndex = 0
Me.addressTextBox.Tag = "Enter the stree address in this text box."
Me.addressTextBox.Text = ""
' City TextBox
Me.cityTextBox.Location = New System.Drawing.Point(16, 48)
Me.cityTextBox.Size = New System.Drawing.Size(120, 20)
Me.cityTextBox.TabIndex = 3
Me.cityTextBox.Tag = "Enter the city here."
Me.cityTextBox.Text = ""
' State TextBox
Me.stateTextBox.Location = New System.Drawing.Point(152, 48)
Me.stateTextBox.MaxLength = 2
Me.stateTextBox.Size = New System.Drawing.Size(32, 20)
Me.stateTextBox.TabIndex = 5
Me.stateTextBox.Tag = "Enter the state in this text box."
Me.stateTextBox.Text = ""
' Zip TextBox
Me.zipTextBox.Location = New System.Drawing.Point(192, 48)
Me.zipTextBox.Size = New System.Drawing.Size(88, 20)
Me.zipTextBox.TabIndex = 6
Me.zipTextBox.Tag = "Enter the zip code here."
Me.zipTextBox.Text = ""
' Set up how the form should be displayed and add the controls to the form.
Me.ClientSize = New System.Drawing.Size(292, 160)
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.zipTextBox, _
Me.stateTextBox, Me.label3, Me.cityTextBox, _
Me.label2, Me.helpLabel, Me.addressTextBox})
Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog
Me.HelpButton = True
Me.MaximizeBox = False
Me.MinimizeBox = False
Me.Text = "Help Event Demonstration"
End Sub
Private Sub textBox_HelpRequested(ByVal sender As Object, ByVal hlpevent As System.Windows.Forms.HelpEventArgs) Handles addressTextBox.HelpRequested, cityTextBox.HelpRequested, stateTextBox.HelpRequested, zipTextBox.HelpRequested
' This event is raised when the F1 key is pressed or the
' Help cursor is clicked on any of the address fields.
' The Help text for the field is in the control's
' Tag property. It is retrieved and displayed in the label.
Dim requestingControl As Control = CType(sender, Control)
helpLabel.Text = CStr(requestingControl.Tag)
hlpevent.Handled = True
End Sub
End Class