[DllImport("coredll.dll", SetLastError=true)]
static extern uint EnableMenuItem(IntPtr hMenu, uint itemId, uint uEnable);
[uEnable]
uint MF_BYCOMMAND = 0x00000000;
uint MF_BYPOSITION = 0x00000400;
uint MF_ENABLED = 0x00000000;
uint MF_GRAYED = 0x00000001;
uint MF_STRING = 0x00000000;
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None.
Use MF_BYCOMMAND to specify the item ID on [itemId] parameter or use MF_BYPOSITION to specify the zero-based index of the item, if neither MF_BYCOMMAND nor MF_BYPOSITION is specified the item ID is used.
IntPtr hMenu = CreatePopupMenu();
AppendMenu(hMenu, MF_STRING, 1001, "Enabled Item");
AppendMenu(hMenu, MF_STRING, 1002, "Disabled Item");
EnableMenuItem(hMenu, 0, MF_BYPOSITION | MF_ENABLED);
EnableMenuItem(hMenu, 1002, MF_BYCOMMAND | MF_GRAYED);