Basic functions
HSSF - provides the function of reading and writing files in Microsoft Excel format.
XSSF - Provides functions for reading and writing files in Microsoft Excel OOXML format.
HWPF - Provides the function of reading and writing files in Microsoft Word format.
HSLF - Provides the function of reading and writing files in Microsoft PowerPoint format.
HDGF - provides the function of reading and writing files in Microsoft Visio format.
How to use
After downloading, click to use
If it cannot be opened or it is blank
Right-click the mouse and enter properties
Click to unlock and click OK
Animation demonstration
Useful
Useful
Useful