The following code example can be used for disable context menu for textbox in vb.net, you can disable right click in textbox in vb.net
Public Class Form2 Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim txtbox As New TextBoxWithNoContextMenu txtbox.Location = New System.Drawing.Point(60, 41) txtbox.Name = "TextBox1" txtbox.Size = New System.Drawing.Size(100, 20) Me.Controls.Add(txtbox) End Sub End Class Public Class TextBoxWithNoContextMenu Inherits System.Windows.Forms.TextBox Protected Overrides Sub WndProc(ByRef messg As System.Windows.Forms.Message) Const WM_CONTEXTMENU As Integer = &H7B If messg.Msg <> WM_CONTEXTMENU Then MyBase.WndProc(messg) End If End Sub End Class