一弹出菜单语句“PopupMenu Files,6”中的“6”没看懂？

原型:object.PopupMenu menuname, flags, x, y, boldcommand
flags说明:
vbPopupMenuLeftAlign 0 (Default) The left side of the pop-up menu is located at x. (左对齐)
vbPopupMenuCenterAlign 4 The pop-up menu is centered at x. (居中)
vbPopupMenuRightAlign 8 The right side of the pop-up menu is located at x. (右对齐)

vbPopupMenuLeftButton 0 (Default) An item on the popup menu reacts to a mouse click only when you use the left mouse button.
vbPopupMenuRightButton 2 An item on the popup menu reacts to a mouse click when you use either the right or the left mouse button