请教个Menu的问题
在Winuser.h中,有些这样的代码:
#define MF_INSERT 0x00000000L
#define MF_CHANGE 0x00000080L
#define MF_APPEND 0x00000100L
#define MF_DELETE 0x00000200L
#define MF_REMOVE 0x00001000L
#define MF_BYCOMMAND 0x00000000L
#define MF_BYPOSITION 0x00000400L
#define MF_SEPARATOR 0x00000800L
#define MF_ENABLED 0x00000000L
#define MF_GRAYED 0x00000001L
#define MF_DISABLED 0x00000002L
#define MF_UNCHECKED 0x00000000L
#define MF_CHECKED 0x00000008L
#define MF_USECHECKBITMAPS 0x00000200L
#define MF_STRING 0x00000000L
#define MF_BITMAP 0x00000004L
#define MF_OWNERDRAW 0x00000100L
#define MF_POPUP 0x00000010L
#define MF_MENUBARBREAK 0x00000020L
#define MF_MENUBREAK 0x00000040L
#define MF_UNHILITE 0x00000000L
#define MF_HILITE 0x00000080L
我想知道的是:MF_INSERT,MF_CHANGE,MF_APPEND,MF_DELETE,MF_REMOVE,MF_BYCOMMAND...的用处是什么?
多谢赐教!