Description: treeview control with the database connection, the operation instance, specific changes, add, delete node function, available for study.
File list (Check if you may need any files):
tree\Form1.frm
....\.oca
....\Module1.bas
....\工程1.vbp
....\MSSCCPRJ.SCC
....\test.mdb
....\Form1.frx
....\工程1.vbw
....\test.mdb.dsn
tree
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