a very good example of a three-tier application, friends can use it as a three-tier database development framework to support BDE, ADO data engine

三层实例
........\APP
........\...\app.cfg
........\...\app.dof
........\...\app.dpr
........\...\app.exe
........\...\app.res
........\...\app.tlb
........\...\app.~tlb
........\...\app_TLB.dcu
........\...\app_TLB.pas
........\...\app_TLB.~pas
........\...\log.dcu
........\...\log.dfm
........\...\log.pas
........\...\log.~dfm
........\...\log.~pas
........\...\Unit2.dcu
........\...\Unit2.ddp
........\...\Unit2.dfm
........\...\Unit2.pas
........\...\Unit2.~ddp
........\...\Unit2.~dfm
........\...\Unit2.~pas
........\clent1
........\......\Project2.cfg
........\......\Project2.dof
........\......\Project2.dpr
........\......\Project2.exe
........\......\Project2.res
........\......\Project2.~dpr
........\......\Unit1.dcu
........\......\Unit1.ddp
........\......\Unit1.dfm
........\......\Unit1.pas
........\......\Unit1.~ddp
........\......\Unit1.~dfm
........\......\Unit1.~pas
........\client
........\......\Project1.cfg
........\......\Project1.dof
........\......\Project1.dpr
........\......\Project1.exe
........\......\Project1.res
........\......\ProjectGroup1.bpg
........\......\Unit1.dcu
........\......\Unit1.ddp
........\......\Unit1.dfm
........\......\Unit1.pas
........\......\Unit1.~dfm
........\......\Unit1.~pas

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