演示主窗体如何修改背景图片\BackGroundPicture\BackGroundPicture.bpr
..........................\.................\BackGroundPicture.cpp
..........................\.................\BackGroundPicture.mak
..........................\.................\BackGroundPicture.res
..........................\.................\Unit\Unit_cbf_jfun\Unit_cbf_jfun.cpp
..........................\.................\....\.............\Unit_cbf_jfun.h
..........................\.................\....\.....Function\Unit_Function.cpp
..........................\.................\....\.............\Unit_Function.h
..........................\.................\....\.....GV\Unit_GV.cpp
..........................\.................\....\.......\Unit_GV.h
..........................\.................\....\.....Inherit\Unit_E.cpp
..........................\.................\....\............\Unit_E.ddp
..........................\.................\....\............\Unit_E.dfm
..........................\.................\....\............\Unit_E.h
..........................\.................\....\............\.....Inherit_QQ\Unit_Inherit_QQ.cpp
..........................\.................\....\............\...............\Unit_Inherit_QQ.ddp
..........................\.................\....\............\...............\Unit_Inherit_QQ.dfm
..........................\.................\....\............\...............\Unit_Inherit_QQ.h
..........................\.................\....\............\...............2\Unit_Inherit_QQ2.cpp
..........................\.................\....\............\................\Unit_Inherit_QQ2.ddp
..........................\.................\....\............\................\Unit_Inherit_QQ2.dfm
..........................\.................\....\............\................\Unit_Inherit_QQ2.h
..........................\.................\....\............_Form_Fun\unit_inherit_form_fun.cpp
..........................\.................\....\.....................\unit_inherit_form_fun.h
..........................\.................\....\.....Main\Unit_Main.cpp
..........................\.................\....\.........\Unit_Main.ddp
..........................\.................\....\.........\Unit_Main.dfm
..........................\.................\....\.........\Unit_Main.h
..........................\BackGroundPicture.exe
..........................\桌面1.jpg
..........................\桌面2.jpg
..........................\BackGroundPicture\Unit\Unit_Inherit\Unit_Inherit_QQ
..........................\.................\....\............\Unit_Inherit_QQ2
..........................\.................\....\Unit_cbf_jfun
..........................\.................\....\Unit_Function
..........................\.................\....\Unit_GV
..........................\.................\....\Unit_Inherit
..........................\.................\....\Unit_Inherit_Form_Fun
..........................\.................\....\Unit_Main
..........................\.................\Unit
..........................\BackGroundPicture
演示主窗体如何修改背景图片