即将从内容迁移 (.cmp) 文件中提取文件的导入操作时，将引发一个事件。
命名空间： Microsoft.SharePoint.Deployment
程序集： Microsoft.SharePoint（位于 Microsoft.SharePoint.dll 中）
语法
声明
Public Event Uncompressing As EventHandler(Of SPDeploymentEventArgs)
用法
Dim instance As SPImport
Dim handler As EventHandler(Of SPDeploymentEventArgs)
AddHandler instance.Uncompressing, handler
public event EventHandler<SPDeploymentEventArgs> Uncompressing