RCM/cInternalScrollBar.cs

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namespace RCM
{
    #region Directives
    using System;
    using System.Windows.Forms;
    using System.Runtime.InteropServices;
    using System.Drawing;
    using System.Text;
    using System.Reflection;
    #endregion

    public class cInternalScrollBar : NativeWindow, IDisposable
    {
        #region Constants
        // style
        private const int GWL_STYLE = (-16);
        private const int GWL_EXSTYLE = (-20);
        private const int WS_EX_TOPMOST = 0x8;
        private const int WS_EX_TOOLWINDOW = 0x80;
        private const int WS_CHILD = 0x40000000;
        private const int WS_OVERLAPPED = 0x0;
        private const int WS_CLIPSIBLINGS = 0x4000000;
        private const int WS_VISIBLE = 0x10000000;
        private const int WS_HSCROLL = 0x100000;
        private const int WS_VSCROLL = 0x200000;
        private const int SS_OWNERDRAW = 0xD;
        // showwindow
        private const int SW_HIDE = 0x0;
        private const int SW_NORMAL = 0x1;
        // size/move
        private const uint SWP_NOSIZE = 0x0001;
        private const uint SWP_NOMOVE = 0x0002;
        private const uint SWP_NOZORDER = 0x0004;
        private const uint SWP_NOREDRAW = 0x0008;
        private const uint SWP_NOACTIVATE = 0x0010;
        private const uint SWP_FRAMECHANGED = 0x0020;
        private const uint SWP_SHOWWINDOW = 0x0040;
        private const uint SWP_HIDEWINDOW = 0x0080;
        private const uint SWP_NOCOPYBITS = 0x0100;
        private const uint SWP_NOOWNERZORDER = 0x0200;
        private const uint SWP_NOSENDCHANGING = 0x0400;
        // setwindowpos
        static readonly IntPtr HWND_NOTOPMOST = new IntPtr(-2);
        static readonly IntPtr HWND_TOPMOST = new IntPtr(-1);
        static readonly IntPtr HWND_TOP = new IntPtr(0);
        static readonly IntPtr HWND_BOTTOM = new IntPtr(1);
        // scroll messages
        private const int WM_HSCROLL = 0x114;
        private const int WM_VSCROLL = 0x115;
        private const int SB_LINEUP = 0;
        private const int SB_LINEDOWN = 1;
        private const int SB_LINELEFT = 0;
        private const int SB_LINERIGHT = 1;
        private const int SB_PAGEUP = 2;
        private const int SB_PAGEDOWN = 3;
        private const int SB_PAGELEFT = 2;
        private const int SB_PAGERIGHT = 3;
        // mouse buttons
        private const int VK_LBUTTON = 0x1;
        private const int VK_RBUTTON = 0x2;