请问这两种有什么不同?

[chenxi385]

InsertMenu(2, MF_BYPOSITION | MF_STRING, 113, "Welcome");
InsertMenu(2, MF_BYPOSITION, 113, "Welcome");

显示出来都是增加了一个Welcome菜单呀,有什么不同的吗?

[@BruceYan@]

是一样的，因为MF_STRING的值为0,写上只是为了易读性吧。

[ouyh12345]

第一种写法提示人们,还可以或上其他属性

[东文-桑晨]

BOOL InsertMenu( HMENU hMenu,
UINT uPosition,
UINT uFlags,
PTR uIDNewItem,
LPCTSTR lpNewItem
);
Parameters

hMenu
[in] Handle to the menu to be changed.
uPosition
[in] Specifies the menu item before which the new menu item is to be inserted, as determined by the uFlags parameter.
uFlags
[in] Specifies flags that control the interpretation of the uPosition parameter and the content, appearance, and behavior of the new menu item. This parameter must be a combination of one of the following required values and at least one of the values listed in the following Remarks section.
MF_BYCOMMAND
Indicates that the uPosition parameter gives the identifier of the menu item. The MF_BYCOMMAND flag is the default if neither the MF_BYCOMMAND nor MF_BYPOSITION flag is specified.
MF_BYPOSITION
Indicates that the uPosition parameter gives the zero-based relative position of the new menu item. If uPosition is -1, the new menu item is appended to the end of the menu.
uIDNewItem
[in] Specifies either the identifier of the new menu item or, if the uFlags parameter has the MF_POPUP flag set, a handle to the drop-down menu or submenu.
lpNewItem
[in] Specifies the content of the new menu item. The interpretation of lpNewItem depends on whether the uFlags parameter includes the MF_BITMAP, MF_OWNERDRAW, or MF_STRING flag, as follows.
MF_BITMAP
Contains a bitmap handle.
MF_OWNERDRAW
Contains an application-supplied value that can be used to maintain additional data related to the menu item. The value is in the itemData member of the structure pointed to by the lParam parameter of the WM_MEASUREITEM or WM_DRAWITEM message sent when the menu item is created or its appearance is updated.
MF_STRING
Contains a pointer to a null-terminated string (the default).