//-----------------------------------------------------------------------

// <copyright file="TransparentRichTextBox.cs" company="NoteFly">

// NoteFly a note application.

// Copyright (C) 2011-2012 Tom

//

// This program is free software: you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation, either version 3 of the License, or

// (at your option) any later version.

//

// This program is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

// GNU General Public License for more details.

//

// You should have received a copy of the GNU General Public License

// along with this program. If not, see <http://www.gnu.org/licenses/>.

// </copyright>

//-----------------------------------------------------------------------

namespace NoteFly

{

using System;

using System.Runtime.InteropServices;

using System.Windows.Forms;

/// <summary>

/// A transparent version of the RichTextBox control.

/// </summary>

public class TransparentRichTextBox : RichTextBox

{

/// <summary>

/// Override createParams to add support for a transparant background image.

/// </summary>

protected override CreateParams CreateParams

{

get

{

CreateParams prams = base.CreateParams;

if (Settings.NotesTransparentRTB)

{

if (Program.CurrentOS == Program.OS.WINDOWS)

{

if (LoadLibrary("msftedit.dll") != IntPtr.Zero)

{

prams.ExStyle |= 0x020; // transparent

prams.ClassName = "RICHEDIT50W";

}

}

}

return prams;

}

}

[DllImport("kernel32.dll", CharSet = CharSet.Auto)]

private static extern IntPtr LoadLibrary(string lpFileName);

}

}