mirror of
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92 lines
3.5 KiB
C#
92 lines
3.5 KiB
C#
/* Copyright (c) Citrix Systems Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms,
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* with or without modification, are permitted provided
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* that the following conditions are met:
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*
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* * Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the
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* following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the
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* following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Runtime.InteropServices;
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using System.Windows.Forms;
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namespace XenAdmin.Core
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{
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/// <summary>
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/// See http://www.ageektrapped.com/blog/the-missing-net-1-cue-banners-in-windows-forms-em_setcuebanner-text-prompt
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/// </summary>
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static class CueBannersManager
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{
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private const uint ECM_FIRST = 0x1500;
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private const uint EM_SETCUEBANNER = ECM_FIRST + 1;
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[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = false)]
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static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, uint wParam, [MarshalAs(UnmanagedType.LPWStr)] string lParam);
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[DllImport("user32.dll")]
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private static extern bool GetComboBoxInfo(IntPtr hwnd, ref COMBOBOXINFO pcbi);
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[StructLayout(LayoutKind.Sequential)]
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private struct COMBOBOXINFO
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{
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public int cbSize;
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public RECT rcItem;
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public RECT rcButton;
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public IntPtr stateButton;
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public IntPtr hwndCombo;
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public IntPtr hwndItem;
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public IntPtr hwndList;
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}
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[StructLayout(LayoutKind.Sequential)]
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private struct RECT
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{
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public int left;
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public int top;
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public int right;
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public int bottom;
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}
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public static void SetWatermark(TextBox textBox, string watermarkText)
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{
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SendMessage(textBox.Handle, EM_SETCUEBANNER, 0, watermarkText);
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}
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public static void SetWatermark(ComboBox comboBox, string watermarkText)
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{
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//a combobox is made up of three controls, a button, a list and textbox;
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//we want the textbox
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COMBOBOXINFO info = new COMBOBOXINFO();
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info.cbSize = Marshal.SizeOf(info);
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GetComboBoxInfo(comboBox.Handle, ref info);
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SendMessage(info.hwndItem, EM_SETCUEBANNER, 0, watermarkText);
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}
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}
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}
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