在托盘上显示Balloon Tooltip（VB.NET）

使用VB编写在托盘上显示Balloon提示的功能就需要调用Win32Api了，但是VB6和VB.NET代码上还是有些不同的，红色部分即为二者区别

Imports System.Runtime.InteropServices

Public Class Form1
    Inherits System.Windows.Forms.Form

#Region "Win32Api_NotifyIcon"
    Private Declare Function Shell_NotifyIcon Lib "shell32.dll" Alias _
         "Shell_NotifyIconA" (ByVal dwMessage As Int32, _
    ByRef lpData As NOTIFYICONDATA) As Int32

    Private Structure NOTIFYICONDATA
        Public cbSize As Int32
        Public hwnd As IntPtr
        Public uId As Int32
        Public uFlags As Int32
        Public uCallBackMessage As Int32
        Public hIcon As IntPtr
        _
                Public szTip As String
        Public dwState As Int32
        Public dwStateMask As Int32
        _
        Public szInfo As String
        Public uTimeoutOrVersion As Int32
        _
        Public szInfoTitle As String
        Public dwInfoFlags As Int32
    End Structure

    Private Const NOTIFYICON_VERSION = 3
    Private Const NOTIFYICON_OLDVERSION = 0

    Private Const NIM_ADD = &H0
    Private Const NIM_MODIFY = &H1
    Private Const NIM_DELETE = &H2

    Private Const NIM_SETFOCUS = &H3
    Private Const NIM_SETVERSION = &H4

    Private Const NIF_MESSAGE = &H1
    Private Const NIF_ICON = &H2
    Private Const NIF_TIP = &H4

    Private Const NIF_STATE = &H8
    Private Const NIF_INFO = &H10

    Private Const NIS_HIDDEN = &H1
    Private Const NIS_SHAREDICON = &H2

    Private Const NIIF_NONE = &H0
    Private Const NIIF_WARNING = &H2
    Private Const NIIF_ERROR = &H3
    Private Const NIIF_INFO = &H1

    Private nfIconData As NOTIFYICONDATA

#End Region

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        nfIconData = New NOTIFYICONDATA()
        With nfIconData
            .cbSize = System.Runtime.InteropServices.Marshal.SizeOf(nfIconData)
            .hwnd = Me.Handle
            .uId = vbNull
            .uFlags = NIF_INFO Or NIF_ICON Or NIF_TIP Or NIF_MESSAGE
            .hIcon = Me.Icon.Handle
            .szTip = "123" '& Microsoft.VisualBasic.vbNullChar
            .dwState = 0
            .dwStateMask = 0
            .szInfo = "Balloon Style Tool-tip" & Chr(13) & "哈哈" '& vbNullChar
            .uTimeoutOrVersion = 15000
            .szInfoTitle = "看到了么?" '& Microsoft.VisualBasic.vbNullChar
            .dwInfoFlags = NIIF_INFO
        End With

        Call Shell_NotifyIcon(NIM_ADD, nfIconData)

    End Sub

    Private Sub Form1_Closed(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Closed
        Call Shell_NotifyIcon(NIM_DELETE, nfIconData)
    End Sub
End Class