通用对话框CommonDialog中的方法

A．ShowOpen
ShowSave
ShowColor
ShowFont
ShowPrinter
ShowHelp
B．ShowOpen
ShowClose
ShowColor
ShowFont
ShowPrinter
ShowHelp
C．ShowOpen
ShowSave
ShowFont
ShowPrinter
ShowHelp
D．ShowOpen
ShowClose
ShowFont
ShowPrinter
ShowHelp