（30）下列事件过程可以将打开文件对话框的标题改变为“new Caption”.A.Private Sub Commandl_Click

（30）下列事件过程可以将打开文件对话框的标题改变为“new Caption”.A.Private Sub Commandl_Click() CommonDialog1.DialogTitle="new Caption" CommonDialog1.ShowFont End Sub B.Private Sub Commandl_Click() CommonDialog1.DialogTitle="new Caption" CommonDialog1.ShowOpen End Sub C.Private Sub Commandl_Click() CommonDialog1.DialogTitle="new Caption" CommonDialog1.ShowHelp End Sub D.Private Sub Commandl_Click(） CommonDialog1.DialogTitle="new Caption" CommonDialog1.ShowColor End Sub