ListBox中的字符串超长显示的解决方法

原创于 2004-10-24 14:25:00 发布

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#integer #list #button #function #user

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博客展示了一段代码，实现了List控件在鼠标移动时显示对应项提示信息的功能。通过声明SendMessage函数，在Form_Load事件中添加列表项，在List1_MouseMove事件中根据鼠标位置获取列表项索引，并将对应项内容设为提示文本。

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Option Explicit
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Private Const LB_ITEMFROMPOINT = &H1A9

Private Sub Form_Load()
    Dim i As Integer
    For i = 0 To 5
        List1.AddItem "ListItem字符串超长超长超长超长超长咯    " & i
    Next
End Sub

Private Sub List1_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
    Dim lParam As Long
    Dim lResult As Long
    lParam = (CInt(Y / Screen.TwipsPerPixelY) * 2 ^ 16) + CInt(X / Screen.TwipsPerPixelX)
    lResult = SendMessage(List1.hwnd, LB_ITEMFROMPOINT, 0, ByVal lParam)

    If lResult < 0 Or lResult > 32767 Then
        List1.ToolTipText = ""
        Exit Sub
    End If

    Dim nIndex As Integer
    nIndex = CInt(lResult)
    List1.ToolTipText = List1.List(nIndex)
End Sub