Get enhanced listbox control, multi-level selection! ~ After I upload the code does not focus on practicality, only focused on understanding, everyone is taught how to write! ~

ListBox
.......\Form1.frm
.......\icons
.......\.....\1.ico
.......\.....\2.ico
.......\LeftMenu.ini
.......\MSSCCPRJ.SCC
.......\UserControl1.ctl
.......\UserControl1.ctx
.......\工程1.vbp
.......\工程1.vbw
.......\工程2.vbp
.......\工程2.vbw
.......\组1.vbg

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