RCM/cHeader.cs

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namespace RCM
{
    #region Directives
    using System;
    using System.Windows.Forms;
    using System.Runtime.InteropServices;
    using System.Drawing;
    using System.Drawing.Drawing2D;
    using System.Text;
    #endregion
 
    [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")]
    public class cHeader : NativeWindow, IDisposable
    {
        #region Constants
        // misc
        private const int GWL_STYLE = (-16);
        private const int GWL_EXSTYLE = (-20);
        private const int WS_ENABLED = 0x02;
        private const int CLR_NONE = -1;
        private const int ILD_TRANSPARENT = 0x1;
        // mouse buttons
        private const int VK_LBUTTON = 0x1;
        private const int VK_RBUTTON = 0x2;
        private const int SM_SWAPBUTTON = 23;
        // theming
        private const int HP_HEADERSORTARROW = 4;
        private const int HSAS_SORTEDUP = 1;
        private const int HSAS_SORTEDDOWN = 2;

        // header flags
        private const int HDF_LEFT = 0x0000;
        private const int HDF_RIGHT = 0x0001;
        private const int HDF_CENTER = 0x0002;
        private const int HDF_JUSTIFYMASK = 0x0003;
        private const int HDF_RTLREADING = 4;
        private const int HDF_OWNERDRAW = 0x8000;
        private const int HDF_STRING = 0x4000;
        private const int HDF_BITMAP = 0x2000;
        private const int HDF_BITMAP_ON_RIGHT = 0x1000;
        private const int HDF_IMAGE = 0x0800;
        private const int HDF_SORTUP = 0x0400;
        private const int HDF_SORTDOWN = 0x0200;
        private const int HDF_CHECKBOX = 0x0040;
        private const int HDF_CHECKED = 0x0080;
        private const int HDF_FIXEDWIDTH = 0x0100;
        private const int HDF_SPLITBUTTON = 0x1000000;
        private const int HDFT_ISSTRING = 0x0000;
        private const int HDFT_ISNUMBER = 0x0001;
        private const int HDFT_ISDATE = 0x0002;
        private const int HDFT_HASNOVALUE = 0x8000;
        // header item
        private const int HDI_WIDTH = 0x0001;
        private const int HDI_HEIGHT = HDI_WIDTH;
        private const int HDI_TEXT = 0x0002;
        private const int HDI_FORMAT = 0x0004;
        private const int HDI_LPARAM = 0x0008;
        private const int HDI_BITMAP = 0x0010;
        private const int HDI_IMAGE = 0x0020;
        private const int HDI_DI_SETITEM = 0x0040;