How to Hide the Add to dictionary Context Menu Item

Updated on Sep 24, 2025

Environment

Product Version	Product	Author
2019.3.917	RadSpellChecker for WinForms	Desislava Yordanova

Description

RadSpellChecker offers spell-check as you type functionality that is supported for RadTextBox and RadTextBoxControl. This article demonstrates how to hide the 'Add to Dictionary' option in the context menu which is shown once you right-click an incorrect word.

Solution

You can find below two sample code snippets demonstrating how to access the context menu with suggested words and hide the 'Add to Dictionary' option.

Hide the 'Add to Dictionary' menu item for RadTextBoxControl

C#

public RadForm1()
{
    InitializeComponent();
    this.radSpellChecker1.AutoSpellCheckControl = this.radTextBoxControl1;
    this.radTextBoxControl1.Text = "Once uponn a time";

    this.radTextBoxControl1.ContextMenuOpening += radTextBoxControl1_ContextMenuOpening;
}

private void radTextBoxControl1_ContextMenuOpening(object sender, TreeBoxContextMenuOpeningEventArgs e)
{
    foreach (RadItem item in e.ContextMenu.Items)
    {
        if (item.Text.Contains("Add to Dictionary"))
            item.Visibility = Telerik.WinControls.ElementVisibility.Collapsed;
    }
}

        

VB.NET

Sub New()

    InitializeComponent()

    Me.RadSpellChecker1.AutoSpellCheckControl = Me.RadTextBoxControl1
    Me.RadTextBoxControl1.Text = "Once uponn a time"

    AddHandler Me.RadTextBoxControl1.ContextMenuOpening, AddressOf RadTextBoxControl1_ContextMenuOpening
End Sub

Private Sub RadTextBoxControl1_ContextMenuOpening(sender As Object, e As TreeBoxContextMenuOpeningEventArgs)
    For Each item As RadItem In e.ContextMenu.Items

        If item.Text.Contains("Add to Dictionary") Then
            item.Visibility = Telerik.WinControls.ElementVisibility.Collapsed
        End If
    Next
End Sub
   

Hide the 'Add to Dictionary' menu item for RadTextBox

C#

public RadForm1()
{
    InitializeComponent();
    this.radSpellChecker1.AutoSpellCheckControl = this.radTextBox1;
    this.radTextBox1.Text = "Once uponn a time";
    
    TextBoxSpellChecker textSpellChecker = this.radSpellChecker1.GetControlSpellChecker(typeof(RadTextBox)) as TextBoxSpellChecker;
    if (textSpellChecker != null)
    {
        textSpellChecker.DropDownMenu.PopupOpening += DropDownMenu_PopupOpening;
    }
}

private void DropDownMenu_PopupOpening(object sender, CancelEventArgs args)
{
    RadDropDownMenu menu = sender as RadDropDownMenu;
    foreach (RadItem item in menu.Items)
    {
        if (item.Text.Contains("Add to Dictionary"))
        {
            item.Visibility = Telerik.WinControls.ElementVisibility.Collapsed;
        }
    }
}
        

VB.NET

Sub New()

    InitializeComponent()

    Me.RadSpellChecker1.AutoSpellCheckControl = Me.RadTextBox1
    Me.RadTextBox1.Text = "Once uponn a time"
    Dim textSpellChecker As TextBoxSpellChecker = TryCast(Me.RadSpellChecker1.GetControlSpellChecker(GetType(RadTextBox)), TextBoxSpellChecker)

    If textSpellChecker IsNot Nothing Then
        AddHandler textSpellChecker.DropDownMenu.PopupOpening, AddressOf DropDownMenu_PopupOpening
    End If
End Sub
Private Sub DropDownMenu_PopupOpening(ByVal sender As Object, ByVal args As CancelEventArgs)
    Dim menu As RadDropDownMenu = TryCast(sender, RadDropDownMenu)

    For Each item As RadItem In menu.Items

        If item.Text.Contains("Add to Dictionary") Then
            item.Visibility = Telerik.WinControls.ElementVisibility.Collapsed
        End If
    Next
End Sub