//获取当前正活动的文档 

Document activeDocument = applicationObject.ActiveDocument;

if(activeDocument != null)

...{

ProjectItem projectItem = activeDocument.ProjectItem;

if(projectItem != null)

...{

FileCodeModel fileCodeModel = projectItem.FileCodeModel;

if(fileCodeModel != null)

...{

CodeElements codeElements = fileCodeModel.CodeElements;

if(codeElements != null)

...{

foreach(CodeElement ce in codeElements)

...{

result.AddRange(getCodeElements(ce));

}

}

}

}

}