判断程序是否已经运作

 Public Shared Function IsRunning(processName As String) As Boolean
            Dim btnIsRun As Boolean = False

            Dim owner As String = GetProcessOwner(App)
            Dim po As String = owner.Substring(owner.LastIndexOf("\") + 1)

            Try
                Dim listProc() As System.Diagnostics.Process
                listProc = System.Diagnostics.Process.GetProcessesByName(processName)
                If listProc.Length > 0 AndAlso GetUserName() = po Then
                    btnIsRun = True
                Else
                    btnIsRun = False
                End If
            Catch ex As Exception
                btnIsRun = False
            End Try
            Return btnIsRun
        End Function