主题：[求助]求助不能如何设置同时打开多个开发版发布的程序

全局代码：

Public mu As System.Threading.Mutex

BeforeOpenProject事件:

Dim sucess As Boolean = False
mu = new System.Threading.Mutex(True, "dsdfhdfghf", sucess)
If not sucess Then
    MessageBox.Show("只能打开一次!")
    e.Cancel = True
End If