public void UpdateMenu(IWindowMenuItem menuItem)
{
var mii = new MENUITEMINFO(null)
{
fMask = MenuItemInfoMember.MIIM_CHECKMARKS |
MenuItemInfoMember.MIIM_DATA |
MenuItemInfoMember.MIIM_FTYPE |
MenuItemInfoMember.MIIM_ID |
MenuItemInfoMember.MIIM_STATE |
MenuItemInfoMember.MIIM_STRING
};
PInvokeUtils.Try(() => SystemMenuAPI.GetMenuItemInfo(_hSysMenu, menuItem.Id, false, ref mii));
if (menuItem.Enabled)
{
mii.fState &= (~MenuItemState.MFS_DISABLED); // clear "disabled" flag
}
else
{
mii.fState |= MenuItemState.MFS_DISABLED; // set "disabled" flag
}
if (menuItem.Checked)
{
mii.fState |= MenuItemState.MFS_CHECKED; // set "checked" flag
}
else
{
mii.fState &= (~MenuItemState.MFS_CHECKED); // clear "checked" flag
}
mii.fMask = MenuItemInfoMember.MIIM_STATE;
PInvokeUtils.Try(() => SystemMenuAPI.SetMenuItemInfo(_hSysMenu, menuItem.Id, false, ref mii));
// TODO: From my observations, this function always returns false, even though it appears to succeed.
// Am I using it incorrectly?
SystemMenuAPI.DrawMenuBar(_hSysMenu);
}