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SelvinPL/logwndproc.cs

Last active April 7, 2022 08:59
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Paste it to linqpad, add references and imports (bonus NativeWindow solution)
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logwndproc.cs
//using System.Windows.Forms
//using System.Runtime.InteropServices
//add references to System.Windows.Forms.dll
void Main()
{
var frm = new Form();
WndProc oldWndProc = null;
WndProc newWndProc = (hWnd, Msg, wParam, lParam) =>
{
Console.WriteLine("hWnd; {0}, Msg: {1}, wParam: {2}, lParam: {3}", hWnd, Msg, wParam, lParam);
if(oldWndProc != null)
return oldWndProc(hWnd, Msg, wParam, lParam);
return IntPtr.Zero;
};
oldWndProc = SetWindowProc(frm.Handle, newWndProc);
//or
//var sniffer = new SnifferNativeWindow(frm);
Application.Run(frm);
}
[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
public delegate IntPtr WndProc(IntPtr hWnd, WindowsMessage msg, IntPtr wParam, IntPtr lParam);
[DllImport("user32.dll", EntryPoint = "SetWindowLongW")]
private static extern IntPtr SetWindowLongPtr32(IntPtr hWnd, int nIndex, IntPtr dwNewLong);
[DllImport("user32.dll", EntryPoint = "SetWindowLongPtrW")]
private static extern IntPtr SetWindowLongPtr64(IntPtr hWnd, int nIndex, IntPtr dwNewLong);
const int GWLP_WNDPROC = -4;
public static WndProc SetWindowProc(IntPtr hWnd, WndProc newWndProc)
{
IntPtr newWndProcPtr = Marshal.GetFunctionPointerForDelegate(newWndProc);
IntPtr oldWndProcPtr;
if (IntPtr.Size == 8)
oldWndProcPtr = SetWindowLongPtr64(hWnd, GWLP_WNDPROC, newWndProcPtr);
else
oldWndProcPtr = SetWindowLongPtr32(hWnd, GWLP_WNDPROC, newWndProcPtr);
var proc = Marshal.GetDelegateForFunctionPointer(oldWndProcPtr, typeof(WndProc));
//hack because GetDelegateForFunctionPointer returns System.Windows.Forms.NativeMethods.WndProc
return (WndProc) Delegate.CreateDelegate(typeof(WndProc), proc.Target, proc.Method);
}
class SnifferNativeWindow : NativeWindow
{
public SnifferNativeWindow(Control ctrl)
{
AssignHandle(ctrl.Handle);
}
protected override void WndProc(ref Message m)
{
Console.WriteLine("Native hWnd; {0}, Msg: {1}, wParam: {2}, lParam: {3}", m.HWnd, (WindowsMessage)m.Msg, m.WParam, m.LParam);
if (m.Msg == (int)WindowsMessage.WM_DESTROY)
ReleaseHandle();
base.WndProc(ref m);
}
}
public enum WindowsMessage
{
WM_NULL = 0x0000,
WM_CREATE = 0x0001,
WM_DESTROY = 0x0002,
WM_MOVE = 0x0003,
WM_SIZE = 0x0005,
WM_ACTIVATE = 0x0006,
WM_SETFOCUS = 0x0007,
WM_KILLFOCUS = 0x0008,
WM_ENABLE = 0x000A,
WM_SETREDRAW = 0x000B,
WM_SETTEXT = 0x000C,
WM_GETTEXT = 0x000D,
WM_GETTEXTLENGTH = 0x000E,
WM_PAINT = 0x000F,
WM_CLOSE = 0x0010,
WM_QUERYENDSESSION = 0x0011,
WM_QUERYOPEN = 0x0013,
WM_ENDSESSION = 0x0016,
WM_QUIT = 0x0012,
WM_ERASEBKGND = 0x0014,
WM_SYSCOLORCHANGE = 0x0015,
WM_SHOWWINDOW = 0x0018,
WM_WININICHANGE = 0x001A,
WM_SETTINGCHANGE = WM_WININICHANGE,
WM_DEVMODECHANGE = 0x001B,
WM_ACTIVATEAPP = 0x001C,
WM_FONTCHANGE = 0x001D,
WM_TIMECHANGE = 0x001E,
WM_CANCELMODE = 0x001F,
WM_SETCURSOR = 0x0020,
WM_MOUSEACTIVATE = 0x0021,
WM_CHILDACTIVATE = 0x0022,
WM_QUEUESYNC = 0x0023,
WM_GETMINMAXINFO = 0x0024,
WM_PAINTICON = 0x0026,
WM_ICONERASEBKGND = 0x0027,
WM_NEXTDLGCTL = 0x0028,
WM_SPOOLERSTATUS = 0x002A,
WM_DRAWITEM = 0x002B,
WM_MEASUREITEM = 0x002C,
WM_DELETEITEM = 0x002D,
WM_VKEYTOITEM = 0x002E,
WM_CHARTOITEM = 0x002F,
WM_SETFONT = 0x0030,
WM_GETFONT = 0x0031,
WM_SETHOTKEY = 0x0032,
WM_GETHOTKEY = 0x0033,
WM_QUERYDRAGICON = 0x0037,
WM_COMPAREITEM = 0x0039,
WM_GETOBJECT = 0x003D,
WM_COMPACTING = 0x0041,
WM_COMMNOTIFY = 0x0044,
WM_WINDOWPOSCHANGING = 0x0046,
WM_WINDOWPOSCHANGED = 0x0047,
WM_POWER = 0x0048,
WM_COPYDATA = 0x004A,
WM_CANCELJOURNAL = 0x004B,
WM_NOTIFY = 0x004E,
WM_INPUTLANGCHANGEREQUEST = 0x0050,
WM_INPUTLANGCHANGE = 0x0051,
WM_TCARD = 0x0052,
WM_HELP = 0x0053,
WM_USERCHANGED = 0x0054,
WM_NOTIFYFORMAT = 0x0055,
WM_CONTEXTMENU = 0x007B,
WM_STYLECHANGING = 0x007C,
WM_STYLECHANGED = 0x007D,
WM_DISPLAYCHANGE = 0x007E,
WM_GETICON = 0x007F,
WM_SETICON = 0x0080,
WM_NCCREATE = 0x0081,
WM_NCDESTROY = 0x0082,
WM_NCCALCSIZE = 0x0083,
WM_NCHITTEST = 0x0084,
WM_NCPAINT = 0x0085,
WM_NCACTIVATE = 0x0086,
WM_GETDLGCODE = 0x0087,
WM_SYNCPAINT = 0x0088,
WM_UAHDESTROYWINDOW = 0x0090,
WM_UAHDRAWMENU = 0x0091,
WM_UAHDRAWMENUITEM = 0x0092,
WM_UAHINITMENU = 0x0093,
WM_UAHMEASUREMENUITEM = 0x0094,
WM_UAHNCPAINTMENUPOPUP = 0x0095,
WM_NCMOUSEMOVE = 0x00A0,
WM_NCLBUTTONDOWN = 0x00A1,
WM_NCLBUTTONUP = 0x00A2,
WM_NCLBUTTONDBLCLK = 0x00A3,
WM_NCRBUTTONDOWN = 0x00A4,
WM_NCRBUTTONUP = 0x00A5,
WM_NCRBUTTONDBLCLK = 0x00A6,
WM_NCMBUTTONDOWN = 0x00A7,
WM_NCMBUTTONUP = 0x00A8,
WM_NCMBUTTONDBLCLK = 0x00A9,
WM_NCXBUTTONDOWN = 0x00AB,
WM_NCXBUTTONUP = 0x00AC,
WM_NCXBUTTONDBLCLK = 0x00AD,
WM_NCUAHDRAWCAPTION = 0x00AE,
WM_NCUAHDRAWFRAME = 0x00AF,
WM_INPUT_DEVICE_CHANGE = 0x00FE,
WM_INPUT = 0x00FF,
WM_KEYFIRST = 0x0100,
WM_KEYDOWN = 0x0100,
WM_KEYUP = 0x0101,
WM_CHAR = 0x0102,
WM_DEADCHAR = 0x0103,
WM_SYSKEYDOWN = 0x0104,
WM_SYSKEYUP = 0x0105,
WM_SYSCHAR = 0x0106,
WM_SYSDEADCHAR = 0x0107,
WM_UNICHAR = 0x0109,
WM_KEYLAST = 0x0109,
WM_IME_STARTCOMPOSITION = 0x010D,
WM_IME_ENDCOMPOSITION = 0x010E,
WM_IME_COMPOSITION = 0x010F,
WM_IME_KEYLAST = 0x010F,
WM_INITDIALOG = 0x0110,
WM_COMMAND = 0x0111,
WM_SYSCOMMAND = 0x0112,
WM_TIMER = 0x0113,
WM_HSCROLL = 0x0114,
WM_VSCROLL = 0x0115,
WM_INITMENU = 0x0116,
WM_INITMENUPOPUP = 0x0117,
WM_MENUSELECT = 0x011F,
WM_MENUCHAR = 0x0120,
WM_ENTERIDLE = 0x0121,
WM_MENURBUTTONUP = 0x0122,
WM_MENUDRAG = 0x0123,
WM_MENUGETOBJECT = 0x0124,
WM_UNINITMENUPOPUP = 0x0125,
WM_MENUCOMMAND = 0x0126,
WM_CHANGEUISTATE = 0x0127,
WM_UPDATEUISTATE = 0x0128,
WM_QUERYUISTATE = 0x0129,
WM_CTLCOLORMSGBOX = 0x0132,
WM_CTLCOLOREDIT = 0x0133,
WM_CTLCOLORLISTBOX = 0x0134,
WM_CTLCOLORBTN = 0x0135,
WM_CTLCOLORDLG = 0x0136,
WM_CTLCOLORSCROLLBAR = 0x0137,
WM_CTLCOLORSTATIC = 0x0138,
MN_GETHMENU = 0x01E1,
WM_MOUSEFIRST = 0x0200,
WM_MOUSEMOVE = 0x0200,
WM_LBUTTONDOWN = 0x0201,
WM_LBUTTONUP = 0x0202,
WM_LBUTTONDBLCLK = 0x0203,
WM_RBUTTONDOWN = 0x0204,
WM_RBUTTONUP = 0x0205,
WM_RBUTTONDBLCLK = 0x0206,
WM_MBUTTONDOWN = 0x0207,
WM_MBUTTONUP = 0x0208,
WM_MBUTTONDBLCLK = 0x0209,
WM_MOUSEWHEEL = 0x020A,
WM_XBUTTONDOWN = 0x020B,
WM_XBUTTONUP = 0x020C,
WM_XBUTTONDBLCLK = 0x020D,
WM_MOUSEHWHEEL = 0x020E,
WM_PARENTNOTIFY = 0x0210,
WM_ENTERMENULOOP = 0x0211,
WM_EXITMENULOOP = 0x0212,
WM_NEXTMENU = 0x0213,
WM_SIZING = 0x0214,
WM_CAPTURECHANGED = 0x0215,
WM_MOVING = 0x0216,
WM_POWERBROADCAST = 0x0218,
WM_DEVICECHANGE = 0x0219,
WM_MDICREATE = 0x0220,
WM_MDIDESTROY = 0x0221,
WM_MDIACTIVATE = 0x0222,
WM_MDIRESTORE = 0x0223,
WM_MDINEXT = 0x0224,
WM_MDIMAXIMIZE = 0x0225,
WM_MDITILE = 0x0226,
WM_MDICASCADE = 0x0227,
WM_MDIICONARRANGE = 0x0228,
WM_MDIGETACTIVE = 0x0229,
WM_MDISETMENU = 0x0230,
WM_ENTERSIZEMOVE = 0x0231,
WM_EXITSIZEMOVE = 0x0232,
WM_DROPFILES = 0x0233,
WM_MDIREFRESHMENU = 0x0234,
WM_IME_SETCONTEXT = 0x0281,
WM_IME_NOTIFY = 0x0282,
WM_IME_CONTROL = 0x0283,
WM_IME_COMPOSITIONFULL = 0x0284,
WM_IME_SELECT = 0x0285,
WM_IME_CHAR = 0x0286,
WM_IME_REQUEST = 0x0288,
WM_IME_KEYDOWN = 0x0290,
WM_IME_KEYUP = 0x0291,
WM_MOUSEHOVER = 0x02A1,
WM_MOUSELEAVE = 0x02A3,
WM_NCMOUSEHOVER = 0x02A0,
WM_NCMOUSELEAVE = 0x02A2,
WM_WTSSESSION_CHANGE = 0x02B1,
WM_TABLET_FIRST = 0x02c0,
WM_TABLET_LAST = 0x02df,
WM_CUT = 0x0300,
WM_COPY = 0x0301,
WM_PASTE = 0x0302,
WM_CLEAR = 0x0303,
WM_UNDO = 0x0304,
WM_RENDERFORMAT = 0x0305,
WM_RENDERALLFORMATS = 0x0306,
WM_DESTROYCLIPBOARD = 0x0307,
WM_DRAWCLIPBOARD = 0x0308,
WM_PAINTCLIPBOARD = 0x0309,
WM_VSCROLLCLIPBOARD = 0x030A,
WM_SIZECLIPBOARD = 0x030B,
WM_ASKCBFORMATNAME = 0x030C,
WM_CHANGECBCHAIN = 0x030D,
WM_HSCROLLCLIPBOARD = 0x030E,
WM_QUERYNEWPALETTE = 0x030F,
WM_PALETTEISCHANGING = 0x0310,
WM_PALETTECHANGED = 0x0311,
WM_HOTKEY = 0x0312,
WM_PRINT = 0x0317,
WM_PRINTCLIENT = 0x0318,
WM_APPCOMMAND = 0x0319,
WM_THEMECHANGED = 0x031A,
WM_CLIPBOARDUPDATE = 0x031D,
WM_DWMCOMPOSITIONCHANGED = 0x031E,
WM_DWMNCRENDERINGCHANGED = 0x031F,
WM_DWMCOLORIZATIONCOLORCHANGED = 0x0320,
WM_DWMWINDOWMAXIMIZEDCHANGE = 0x0321,
WM_GETTITLEBARINFOEX = 0x033F,
WM_HANDHELDFIRST = 0x0358,
WM_HANDHELDLAST = 0x035F,
WM_AFXFIRST = 0x0360,
WM_AFXLAST = 0x037F,
WM_PENWINFIRST = 0x0380,
WM_PENWINLAST = 0x038F,
WM_APP = 0x8000,
WM_USER = 0x0400,
WM_REFLECT = WM_USER + 0x1C00,
}
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