Example2_单复选按钮\Project1.bpr ...................\Project1.cpp ...................\Project1.exe ...................\Project1.obj ...................\Project1.res ...................\Unit1.cpp ...................\Unit1.~ddp ...................\Unit1.~dfm ...................\Unit1.h ...................\Unit1.obj ...................\Unit1.dfm ...................\Unit1.ddp ...................\Project1.tds Example2_单复选按钮