将Mouse Up命令添加到numericUpDown wpf

Question

我尝试向自定义控件微调器添加其他功能，但在尝试添加其他命令时出现错误。任何有此经验的人都可以解释为什么这会继续出错。您只需搜索“MouseUp”即可找到有问题的行。它靠近XAML的下三分之一。当我尝试添加它时，它会崩溃。

错误：

  

抛出异常：＆＃39; System.Windows.Markup.XamlParseException＆＃39;在   PresentationFramework.dll

Numeric.xaml

MakeTopMostWindow(Me.Handle.ToInt64, True)
Application.DoEvents()
MakeTopMostWindow(Me.Handle.ToInt64, False)

被调用的命令是：

Private Declare Function SetWindowPos Lib "user32" (ByVal hwnd As Integer, ByVal hWndInsertAfter As Integer, ByVal x As Integer, ByVal y As Integer, ByVal cx As Integer, ByVal cy As Integer, ByVal wFlags As Integer) As Integer

Friend Sub MakeTopMostWindow(ByVal hwnd As Int64, ByVal MakeTopMostFlag As Boolean)

    Dim HWND_TOPMOST As Integer
    If MakeTopMostFlag Then
        HWND_TOPMOST = -1
    Else
        HWND_TOPMOST = -2
    End If

    Dim SWP_NOMOVE As Integer = &H2
    Dim SWP_NOSIZE As Integer = &H1
    Dim TOPMOST_FLAGS As Integer = SWP_NOMOVE Or SWP_NOSIZE
    Try
        SetWindowPos(hwnd, HWND_TOPMOST, 0, 0, 0, 0, TOPMOST_FLAGS)
    Catch ex As Exception 
    End Try

End Sub