本贴精华段：
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
以下附上本CALLAPI.VB的所有代码。各位可根据自己的要求自行修改。
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
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