extracted constants

StylableWinFormsControls/StylableWinFormsControls/Controls/StylableCheckBox.cs

@@ -56,7 +56,7 @@ protected override void OnPaint(PaintEventArgs pevent)
     protected override void WndProc(ref Message m)
     {
         // Filter out the WM_ERASEBKGND message since we do that on our own with foreground painting
-        if (m.Msg == NativeMethods.WM_ERASEBKGND)
+        if (m.Msg == NativeConstants.Messages.WM_ERASEBKGND)
         {
             // return 0 (no erasing)
             m.Result = (IntPtr)1;

StylableWinFormsControls/StylableWinFormsControls/Controls/StylableComboBox.cs

@@ -141,15 +141,15 @@ private void wndProcInternal(ref Message m)
         switch (m.Msg)
         {
             //disabled box
-            case NativeMethods.WM_CTLCOLORSTATIC:
+            case NativeConstants.Messages.WM_CTLCOLORSTATIC:
                 NativeMethods.SetBkColorInternal(m.WParam, ColorTranslator.ToWin32(Color.Orange));
 
                 IntPtr brush = NativeMethods.CreateSolidBrush(ColorTranslator.ToWin32(Color.BlueViolet));
                 m.Result = brush;
                 return;
 
             case 0x133: //coloredit, for the edit area of editable comboboxes
-                NativeMethods.SetBkModeInternal(m.WParam, NativeMethods.BKM_OPAQUE);
+                NativeMethods.SetBkModeInternal(m.WParam, NativeConstants.BKM_OPAQUE);
                 NativeMethods.SetTextColorInternal(m.WParam, ColorTranslator.ToWin32(ForeColor));
                 NativeMethods.SetBkColorInternal(m.WParam, ColorTranslator.ToWin32(BackColor));
 
@@ -158,7 +158,7 @@ private void wndProcInternal(ref Message m)
                 return;
 
             case 0x134: //colorlistbox
-                NativeMethods.SetBkModeInternal(m.WParam, NativeMethods.BKM_OPAQUE);
+                NativeMethods.SetBkModeInternal(m.WParam, NativeConstants.BKM_OPAQUE);
                 NativeMethods.SetTextColorInternal(m.WParam, ColorTranslator.ToWin32(ForeColor));
                 NativeMethods.SetBkColorInternal(m.WParam, ColorTranslator.ToWin32(BackColor));
 

StylableWinFormsControls/StylableWinFormsControls/Controls/StylableListView.cs

@@ -95,7 +95,7 @@ protected override void Dispose(bool disposing)
     protected override void OnNotifyMessage(Message m)
     {
         //Filter out the WM_ERASEBKGND message
-        if (m.Msg != NativeMethods.WM_ERASEBKGND)
+        if (m.Msg != NativeConstants.Messages.WM_ERASEBKGND)
         {
             base.OnNotifyMessage(m);
         }
@@ -107,9 +107,9 @@ protected override void WndProc(ref Message m)
     }
     private void wndProcInternal(ref Message m)
     {
-        if (m.Msg != NativeMethods.WM_REFLECT + NativeMethods.WM_NOFITY)
+        if (m.Msg != NativeConstants.Messages.WM_REFLECT + NativeConstants.Messages.WM_NOFITY)
         {
-            if (m.Msg == NativeMethods.WM_LBUTTONUP)
+            if (m.Msg == NativeConstants.Messages.WM_LBUTTONUP)
             {
                 base.DefWndProc(ref m);
                 return;
@@ -127,7 +127,7 @@ private void wndProcInternal(ref Message m)
         }
 
         NativeMethods.NMHDR pnmhdr = (NativeMethods.NMHDR)nmhdrParam;
-        if (pnmhdr.code != NativeMethods.NM_CUSTOMDRAW)
+        if (pnmhdr.code != NativeConstants.NM_CUSTOMDRAW)
         {
             base.WndProc(ref m);
             return;
@@ -147,7 +147,7 @@ private void wndProcInternal(ref Message m)
             {
                 m.Result = pnmlv.dwItemType switch
                 {
-                    NativeMethods.LVCDI_GROUP => drawGroupHeader(m.HWnd, pnmlv),
+                    NativeConstants.LVCDI_GROUP => drawGroupHeader(m.HWnd, pnmlv),
                     _ => new IntPtr((int)NativeMethods.CDRF.NotifyItemDraw)
                 };
 
@@ -157,7 +157,7 @@ private void wndProcInternal(ref Message m)
             {
                 switch (pnmlv.dwItemType)
                 {
-                    case NativeMethods.LVCDI_ITEM:
+                    case NativeConstants.LVCDI_ITEM:
                         int itemIndex = (int)pnmlv.nmcd.dwItemSpec;
 
                         // skip items that are not selected as they are already drawn correctly
@@ -194,7 +194,7 @@ private IntPtr drawItem(IntPtr mHWnd, int itemIndex, NativeMethods.NMLVCUSTOMDRA
             left = (int)ItemBoundsPortion.Entire
         };
 
-        NativeMethods.SendMessageInternal(mHWnd, NativeMethods.LVM_GETITEMRECT, itemIndex, ref rectHeader);
+        NativeMethods.SendMessageInternal(mHWnd, NativeConstants.Messages.LVM_GETITEMRECT, itemIndex, ref rectHeader);
         using (Graphics g = Graphics.FromHdc(pnmlv.nmcd.hdc))
         {
             // background color
@@ -229,12 +229,12 @@ private IntPtr drawGroupHeader(IntPtr mHWnd, NativeMethods.NMLVCUSTOMDRAW pnmlv)
     {
         NativeMethods.RECT rectHeader = new()
         {
-            top = NativeMethods.LVGGR_HEADER
+            top = NativeConstants.LVGGR_HEADER
         };
 
         int groupIndex = (int)pnmlv.nmcd.dwItemSpec;
 
-        NativeMethods.SendMessageInternal(mHWnd, NativeMethods.LVM_GETGROUPRECT, groupIndex,
+        NativeMethods.SendMessageInternal(mHWnd, NativeConstants.Messages.LVM_GETGROUPRECT, groupIndex,
             ref rectHeader);
         using (Graphics g = Graphics.FromHdc(pnmlv.nmcd.hdc))
         {
@@ -246,11 +246,11 @@ private IntPtr drawGroupHeader(IntPtr mHWnd, NativeMethods.NMLVCUSTOMDRAW pnmlv)
             // Group header text
             NativeMethods.LVGROUP listviewGroup = new();
             listviewGroup.cbSize = (uint)Marshal.SizeOf(listviewGroup);
-            listviewGroup.mask = NativeMethods.LVGF_GROUPID | NativeMethods.LVGF_HEADER;
+            listviewGroup.mask = NativeConstants.LVGF_GROUPID | NativeConstants.LVGF_HEADER;
 
             NativeMethods.SendMessageInternal(
                 mHWnd,
-                NativeMethods.LVM_GETGROUPINFO,
+                NativeConstants.Messages.LVM_GETGROUPINFO,
                 groupIndex,
                 ref listviewGroup);
 

StylableWinFormsControls/StylableWinFormsControls/Controls/StylableTabControl.cs

@@ -459,7 +459,7 @@ private void findUpDown()
         bool bFound = false;
 
         // find the UpDown control
-        IntPtr pWnd = NativeMethods.GetWindow(Handle, NativeMethods.GW_CHILD);
+        IntPtr pWnd = NativeMethods.GetWindow(Handle, NativeConstants.GW_CHILD);
 
         while (pWnd != IntPtr.Zero)
         {
@@ -486,7 +486,7 @@ private void findUpDown()
                 break;
             }
 
-            pWnd = NativeMethods.GetWindow(pWnd, NativeMethods.GW_HWNDNEXT);
+            pWnd = NativeMethods.GetWindow(pWnd, NativeConstants.GW_HWNDNEXT);
         }
 
         if (!bFound && _bUpDown)
@@ -519,7 +519,7 @@ private int scUpDown_SubClassedWndProc(ref Message m)
 
         switch (m.Msg)
         {
-            case NativeMethods.WM_PAINT:
+            case NativeConstants.Messages.WM_PAINT:
                 //------------------------
                 // redraw
                 IntPtr hDc = NativeMethods.GetWindowDC(_scUpDown.Handle);

StylableWinFormsControls/StylableWinFormsControls/Native/NativeConstants.cs

@@ -0,0 +1,212 @@
+using System.Globalization;
+using System.Reflection;
+
+namespace StylableWinFormsControls.Native
+{
+    /// <summary>
+    /// contains constants required for native calls
+    /// </summary>
+    [System.Diagnostics.CodeAnalysis.SuppressMessage(
+        "Roslynator",
+        "RCS1181:Convert comment to documentation comment.",
+        Justification = "Most of the comments are not documentation, but internal notes.")]
+    internal static class NativeConstants
+    {
+        /// <summary>
+        /// Background is filled with the current background color before the text, hatched brush, or pen is drawn.
+        /// </summary>
+        internal const int BKM_OPAQUE = 2;
+
+        /// <summary>
+        /// Background remains untouched.
+        /// </summary>
+        internal const int BKM_TRANSPARENT = 1;
+        /// <summary>
+        /// constant to define dark mode option
+        /// </summary>
+        internal const int DWMWA_USE_IMMERSIVE_DARK_MODE = 20;
+
+        /// <summary>
+        /// constant to define dark mode option
+        /// </summary>
+        internal const int DWMWA_USE_IMMERSIVE_DARK_MODE_BEFORE_20_H1 = 19;
+
+        internal const int GW_CHILD = 5;
+        internal const int GW_HWNDFIRST = 0;
+        internal const int GW_HWNDLAST = 1;
+        internal const int GW_HWNDNEXT = 2;
+        internal const int GW_HWNDPREV = 3;
+        internal const int GW_OWNER = 4;
+        internal const int LVCDI_GROUP = 0x1;
+        internal const int LVCDI_ITEM = 0x0;
+        internal const int LVCDI_ITEMSLIST = 0x2;
+
+        internal const int LVGA_FOOTER_CENTER = 0x10;
+        internal const int LVGA_FOOTER_LEFT = 0x8;
+        // Don't forget to validate exclusivity
+        internal const int LVGA_FOOTER_RIGHT = 0x20;
+
+        internal const int LVGA_HEADER_CENTER = 0x2;
+        internal const int LVGA_HEADER_LEFT = 0x1;
+        // Don't forget to validate exclusivity
+        internal const int LVGA_HEADER_RIGHT = 0x4;
+
+        internal const int LVGF_ALIGN = 0x8;
+        // pszDescriptionBottom is valid
+        internal const int LVGF_DESCRIPTIONBOTTOM = 0x800;
+
+        // pszDescriptionTop is valid
+        internal const int LVGF_DESCRIPTIONTOP = 0x400;
+
+        // iExtendedImage is valid
+        internal const int LVGF_EXTENDEDIMAGE = 0x2000;
+
+        internal const int LVGF_FOOTER = 0x2;
+        internal const int LVGF_GROUPID = 0x10;
+        internal const int LVGF_HEADER = 0x1;
+        // iFirstItem and cItems are valid
+        internal const int LVGF_ITEMS = 0x4000;
+
+        // Listview group specific flags
+        internal const int LVGF_NONE = 0x0;
+
+        internal const int LVGF_STATE = 0x4;
+        // pszSubsetTitle is valid
+        internal const int LVGF_SUBSET = 0x8000;
+
+        // readonly, cItems holds count of items in visible subset, iFirstItem is valid
+        internal const int LVGF_SUBSETITEMS = 0x10000;
+
+        // pszSubtitle is valid
+        internal const int LVGF_SUBTITLE = 0x100;
+
+        // pszTask is valid
+        internal const int LVGF_TASK = 0x200;
+
+        // iTitleImage is valid
+        internal const int LVGF_TITLEIMAGE = 0x1000;
+
+        // Entire expanded group
+        internal const int LVGGR_GROUP = 0;
+
+        // Header only (collapsed group)
+        internal const int LVGGR_HEADER = 1;
+
+        // Label only
+        internal const int LVGGR_LABEL = 2;
+
+        // subset link only
+        internal const int LVGGR_SUBSETLINK = 3;
+
+        internal const int LVGS_COLLAPSED = 0x1;
+        internal const int LVGS_COLLAPSIBLE = 0x8;
+        internal const int LVGS_FOCUSED = 0x10;
+        internal const int LVGS_HIDDEN = 0x2;
+        internal const int LVGS_NOHEADER = 0x4;
+        // Listview group styles
+        internal const int LVGS_NORMAL = 0x0;
+
+        internal const int LVGS_SELECTED = 0x20;
+        internal const int LVGS_SUBSETED = 0x40;
+        internal const int LVGS_SUBSETLINKFOCUSED = 0x80;
+        internal const int LVM_FIRST = 0x1000;
+        /// <summary>
+        /// Return value from <see cref="WM_MOUSEACTIVATE"/>: Activates the window, and does not discard the mouse message
+        /// </summary>
+        internal const uint MA_ACTIVATE = 1;
+
+        /// <summary>
+        /// Return value from <see cref="WM_MOUSEACTIVATE"/>: Activates the window, and discards the mouse message
+        /// </summary>
+        internal const uint MA_ACTIVATEANDEAT = 2;
+
+        internal const int NM_CLICK = NM_FIRST - 2;
+        internal const int NM_CUSTOMDRAW = NM_FIRST - 12;
+        internal const int NM_FIRST = 0;
+        /*
+         * GetWindow() Constants
+         */
+        internal static class Messages
+        {
+            internal const int LVM_GETGROUPINFO = LVM_FIRST + 149;
+            internal const int LVM_GETGROUPRECT = LVM_FIRST + 98;
+            internal const int LVM_GETITEMRECT = LVM_FIRST + 14;
+            /// <summary>
+            /// A static control, or an edit control that is read-only or disabled,
+            /// sends the WM_CTLCOLORSTATIC message to its parent window when the control is about to be drawn.
+            /// By responding to this message, the parent window can use the specified device context handle to set the text and
+            /// background colors of the static control.
+            /// </summary>
+            internal const int WM_CTLCOLORSTATIC = 0x138;
+            /// <summary>
+            /// Sent when the window background must be erased (for example, when a window is resized).
+            /// The message is sent to prepare an invalidated portion of a window for painting.
+            /// </summary>
+            internal const int WM_ERASEBKGND = 0x14;
+
+            /// <summary>
+            /// Posted when the user releases the left mouse button while the cursor is in the client area of a window.
+            /// </summary>
+            internal const int WM_LBUTTONUP = 0x202;
+            /// <summary>
+            /// Sent when the cursor is in an inactive window and the user presses a mouse button.
+            /// </summary>
+            internal const uint WM_MOUSEACTIVATE = 0x21;
+
+            /// <summary>
+            /// Sent by a common control to its parent window when an event has occurred or the control requires some information.
+            /// </summary>
+            internal const int WM_NOFITY = 0x4E;
+
+            /// <summary>
+            /// The WM_PAINT message is sent when the system or another application makes a request to paint a portion of an application's window.
+            /// </summary>
+            internal const int WM_PAINT = 0xF;
+
+            /// <summary>
+            /// MFC Message Reflection
+            /// </summary>
+            /// <remarks>See more: https://learn.microsoft.com/en-us/cpp/mfc/tn062-message-reflection-for-windows-controls</remarks>
+            internal const int WM_REFLECT = 0x2000;
+
+            /// <summary>
+            /// Sent to a window to allow changes in that window to be redrawn, or to prevent changes in that window from being redrawn
+            /// </summary>
+            internal const int WM_SETREDRAW = 11;
+
+            #region reverse msg value logic
+            private static readonly Dictionary<long, string> MESSAGE_NAME_DICT = new();
+            private static void initMessageNameFromValue()
+            {
+                //get all constants
+                FieldInfo[] fieldInfos = typeof(Messages).GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static);
+                List<FieldInfo> constants = (from f in fieldInfos where f.IsLiteral && !f.IsInitOnly && (typeof(int).IsAssignableFrom(f.FieldType) || typeof(uint).IsAssignableFrom(f.FieldType)) select f).ToList();
+
+
+                //add all constants to the messageNameDict
+                constants.ForEach(f =>
+                {
+                    object? value = f.GetValue(null);
+                    if (value is not null)
+                    {
+                        MESSAGE_NAME_DICT.Add(Convert.ToInt64(value, CultureInfo.InvariantCulture), f.Name);
+                    }
+                }
+                );
+            }
+            public static string Reverse(int value)
+            {
+                if (MESSAGE_NAME_DICT.Count == 0)
+                {
+                    initMessageNameFromValue();
+                }
+                if (MESSAGE_NAME_DICT.ContainsKey(value))
+                {
+                    return MESSAGE_NAME_DICT[value];
+                }
+                return $"Unknown Value({value})";
+            }
+            #endregion
+        }
+    }
+}