VB.NET作为一款功能强大的面向对象语言,为我们带来了很多不一样的体验。我们今天可以通过对VB.NET调用WinAPI的操作技巧的掌握,来体验一下这款语言给我们带来的不同之处,从而初步掌握它的应用技巧。
以下为VB.NET调用WinAPI的演示实例:
Declare Auto Function MBox Lib
"user32.dll" _
Alias "MessageBox" (ByVal hWnd
As Integer, _
ByVal txt As String, ByVal
caption As String, _
ByVal Typ As Integer) As Integer
'定义一些要调用参数
Const MB_ICONQUESTION = &H20L
Const MB_YESNO = &H4
Const IDYES = 6
Const IDNO = 7
Private Sub Button1_Click(ByVal
sender As System.Object, ByVal e
As System.EventArgs) Handles
Button1.Click
Dim RetVal As Integer ' 存储返回的值.
RetVal = MBox(0, "调用WinApi成功否?",
"Windows API 信息框", _
MB_ICONQUESTION Or MB_YESNO)
' Check the return value.
If RetVal = IDYES Then
MsgBox("您选择了是")
Else
MsgBox("您选择了不是")
End If
End Sub
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以下附上本CALLAPI.vb的所有代码。各位可根据自己的要求对这段VB.NET调用WinAPI代码自行修改。
Public Class CallApi
Inherits System.Windows.Forms.Form
Declare Auto Function MBox Lib
"user32.dll" _
Alias "MessageBox" (ByVal hWnd
As Integer, _
ByVal txt As String, ByVal
caption As String, _
ByVal Typ As Integer) As Integer
'定义一些要调用参数
Const MB_ICONQUESTION = &H20L
Const MB_YESNO = &H4
Const IDYES = 6
Const IDNO = 7
#Region " Windows Form Designer
generated code "
Public Sub New()
MyBase.New()
'This call is required by the
Windows Form Designer.
InitializeComponent()
'Add any initialization after the
InitializeComponent() call
End Sub
'Form overrides dispose to clean
up the component list.
Protected Overloads Overrides Sub
Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
'Required by the Windows
Form Designer
Private components As System.
ComponentModel.IContainer
'NOTE: The following procedure is
required by the Windows Form Designer
'It can be modified using the
Windows Form Designer.
'Do not modify it using the code editor.
Friend WithEvents Button1 As System.
Windows.Forms.Button
<System.Diagnostics.DebuggerStepThrough()>
Private Sub InitializeComponent()
Me.Button1 = New System.Windows.Forms.Button()
Me.SuspendLayout()
'
'Button1
'
Me.Button1.Location = New System.
Drawing.Point(88, 56)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(168, 48)
Me.Button1.TabIndex = 0
Me.Button1.Text = "调用API的信息框"
'
'CallApi
'
Me.AutoScaleBaseSize = New System.
Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(384, 205)
Me.Controls.AddRange(New System.Windows.
Forms.Control() {Me.Button1})
Me.Name = "CallApi"
Me.Text = "CallApi"
Me.ResumeLayout(False)
End Sub
#End Region
Private Sub Button1_Click(ByVal sender
As System.Object, ByVal e As System.
EventArgs) Handles Button1.Click
Dim RetVal As Integer ' 存储返回的值.
RetVal = MBox(0, "调用WinApi成功否?",
"Windows API 信息框", _
MB_ICONQUESTION Or MB_YESNO)
' Check the return value.
If RetVal = IDYES Then
MsgBox("您选择了是")
Else
MsgBox("您选择了不是")
End If
End Sub
End Class
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VB.NET调用WinAPI代码示例就为大家介绍到这里。
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