MenuItem[] suggs;

TD.SandBar.ToolbarItemBase[] sandBarSuggs;

private void contextMenuBarItem1_BeforePopup(object sender, TD.SandBar.MenuPopupEventArgs e)
{

    this.contextMenuBarItem1.Items.Clear();
    suggs = this.rapidSpellAsYouType1.GetSuggestions();
    if(suggs!=null)//then we have suggestions
    {
        sandBarSuggs = new TD.SandBar.ToolbarItemBase[suggs.Length];
        for(int i=0; i<suggs.Length;i++)
            sandBarSuggs[i] = new TD.SandBar.MenuButtonItem(suggs[i].Text, new EventHandler(this.OnCMClick)); 

        this.contextMenuBarItem1.Items.AddRange(sandBarSuggs);
    } 
}

void OnCMClick(object sender, EventArgs e){
    //rapidspellasyoutype.OnPopUpClick expects the sender to be a MenuItem, so need to call
    //method with original item it produced
    for(int i=0;i<sandBarSuggs.Length; i++)    {

        if(sender == sandBarSuggs[i])
        {
            this.rapidSpellAsYouType1.OnPopUpClick(suggs[i], e);
        }
    }
}