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In the Excel program (version 07 and above), there are two places where you can insert text boxes. One is in Insert → Shapes, the other is on the right side of the top menu of the Insert option.


You can create text boxes with horizontal or vertical text.
Now you have a text box.
When you need to bulk insert TextBoxes into the worksheet, the manual insertion method is obviously a disaster. If this bothers you, I think this document will help you. Aspose.Cells provides you with an API to easily do bulk inserts in your code.
The following sample code creates a text box.
You will get a file similar to the result file. In the file, you will see the following:

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