using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace HStation.RevitDev.RevitDataExport.Utils
{
///
/// TextBox 添加水印功能类
///
public static class WaterRemark
{
private const int EM_SETCUEBANNER = 0x1501;
[DllImport("user32.dll", CharSet = CharSet.Auto)]
private static extern Int32 SendMessage
(IntPtr hWnd, int msg, int wParam, [MarshalAs(UnmanagedType.LPWStr)] string lParam);
public static void SetWatermark(this ComboBox comboBox, string watermark)
{
SendMessage(comboBox.Handle, EM_SETCUEBANNER, 0, watermark);
}
///
/// 为ToolStripTextBox设置水印文字
/// ToolStripTextBox
/// TextBox
/// 水印文字
public static void SetWatermark(this ToolStripTextBox textBox, string watermark)
{
SendMessage(textBox.TextBox.Handle, EM_SETCUEBANNER, 0, watermark);
}
///
/// 为ToolStripTextBox设置水印文字
/// ToolStripTextBox
/// TextBox
/// 水印文字
public static void SetWatermark(this RichTextBox textBox, string watermark)
{
SendMessage(textBox.Handle, EM_SETCUEBANNER, 0, watermark);
}
///
/// 清除水印文字
///
/// TextBox
public static void ClearWatermark(this TextBox textBox)
{
SendMessage(textBox.Handle, EM_SETCUEBANNER, 0, string.Empty);
}
}
}