What does mean "property node and invoke node"?

I want to read excell file and could program it with refering to this discussion board.
But I can't understand details of this process.
For examples , What does mean to put "workbooks,visible,Displayalert"?
and What does mean "open,filename,etc・・"?
I want to be taught this object meaning each process as minutely as possible.
Hope your help!
Attachments:
設定配列読込（Excel to string table).vi ‏64 KB

Typically with any activeX programming in labview you drop an reference to an object , open the reference, then invoke the methods and set the properties and when done you close the reference.  To select what reference you would like right click on the activeX reference and choose "browse".  The excel object library provides many activeX interfaces but typically you would manipulate the application object, Workbook or worksheet but I have only used the excel interface a few times, I prefer to use excel offline and not directly communicate with the application programmaticly.  You can also place an axtiveX container on the front panel and select the Excel container object to embed an excel instance on your front panel.  Good luck.
Paul
Paul Falkenstein
Coleman Technologies Inc.
CLA, CPI, AIA-Vision
Labview 4.0- 2013, RT, Vision, FPGA

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