unit Mlist;

interface

uses
  SysUtils, Classes, Messages;

var
  MsgList: TStringList;

function GetMessageName (Msg: Integer): string;

implementation

function GetMessageName (Msg: Integer): string;
var
  N: Integer;
begin
  N := MsgList.IndexOfObject (TObject(Msg));
  if N >= 0 then
    Result := MsgList.Strings [N]
  else if (Msg >= wm_User) and
      (Msg <= $7FFF) then
    Result := Format (
      'wm_User message (%d)', [Msg])
  else
    Result := Format (
      'Undocumented (%d)', [Msg]);
end;

initialization
  MsgList := TStringList.Create;
  MsgList.AddObject ('wm_Null', TObject($0000));
  MsgList.AddObject ('wm_Create', TObject($0001));
  MsgList.AddObject ('wm_Destroy', TObject($0002));
  MsgList.AddObject ('wm_Move', TObject($0003));
  MsgList.AddObject ('wm_Size', TObject($0005));
  MsgList.AddObject ('wm_Activate', TObject($0006));
  MsgList.AddObject ('wm_SetFocus', TObject($0007));
  MsgList.AddObject ('wm_KillFocus', TObject($0008));
  MsgList.AddObject ('wm_Enable', TObject($000A));
  MsgList.AddObject ('wm_SetRedraw', TObject($000B));
  MsgList.AddObject ('wm_SetText', TObject($000C));
  MsgList.AddObject ('wm_GetText', TObject($000D));
  MsgList.AddObject ('wm_GetTextLength', TObject($000E));
  MsgList.AddObject ('wm_Paint', TObject($000F));
  MsgList.AddObject ('wm_Close', TObject($0010));
  MsgList.AddObject ('wm_QueryEndSession', TObject($0011));
  MsgList.AddObject ('wm_Quit', TObject($0012));
  MsgList.AddObject ('wm_QueryOpen', TObject($0013));
  MsgList.AddObject ('wm_EraseBkGnd', TObject($0014));
  MsgList.AddObject ('wm_SysColorChange', TObject($0015));
  MsgList.AddObject ('wm_EndSession', TObject($0016));
  MsgList.AddObject ('wm_SystemError', TObject($0017));
  MsgList.AddObject ('wm_ShowWindow', TObject($0018));
  MsgList.AddObject ('wm_CtlColor', TObject($0019));
  MsgList.AddObject ('wm_WinIniChange', TObject($001A));
  MsgList.AddObject ('wm_DevModeChange', TObject($001B));
  MsgList.AddObject ('wm_ActivateApp', TObject($001C));
  MsgList.AddObject ('wm_FontChange', TObject($001D));
  MsgList.AddObject ('wm_TimeChange', TObject($001E));
  MsgList.AddObject ('wm_CancelMode', TObject($001F));
  MsgList.AddObject ('wm_SetCursor', TObject($0020));
  MsgList.AddObject ('wm_MouseActivate', TObject($0021));
  MsgList.AddObject ('wm_ChildActivate', TObject($0022));
  MsgList.AddObject ('wm_QueueSync', TObject($0023));
  MsgList.AddObject ('wm_GetMinMaxInfo', TObject($0024));
  MsgList.AddObject ('wm_PaintIcon', TObject($0026));
  MsgList.AddObject ('wm_IconEraseBkGnd', TObject($0027));
  MsgList.AddObject ('wm_NextDlgCtl', TObject($0028));
  MsgList.AddObject ('wm_SpoolerStatus', TObject($002A));
  MsgList.AddObject ('wm_DrawItem', TObject($002B));
  MsgList.AddObject ('wm_MeasureItem', TObject($002C));
  MsgList.AddObject ('wm_DeleteItem', TObject($002D));
  MsgList.AddObject ('wm_VKeyToItem', TObject($002E));
  MsgList.AddObject ('wm_CharToItem', TObject($002F));
  MsgList.AddObject ('wm_SetFont', TObject($0030));
  MsgList.AddObject ('wm_GetFont', TObject($0031));
  MsgList.AddObject ('wm_QueryDragIcon', TObject($0037));
  MsgList.AddObject ('wm_CompareItem', TObject($0039));
  MsgList.AddObject ('wm_Compacting', TObject($0041));
  MsgList.AddObject ('wm_CommNotify', TObject($0044));
  MsgList.AddObject ('wm_WindowPosChanging', TObject($0046));
  MsgList.AddObject ('wm_WindowPosChanged', TObject($0047));
  MsgList.AddObject ('wm_Power', TObject($0048));
  MsgList.AddObject ('wm_CopyData', TObject($004A));
  MsgList.AddObject ('wm_CancelJournal', TObject($004B));
  MsgList.AddObject ('wm_Notify', TObject($004E));
  MsgList.AddObject ('wm_StyleChanging', TObject($007C));
  MsgList.AddObject ('wm_StyleChanged', TObject($007D));
  MsgList.AddObject ('wm_GetIcon', TObject($007F));
  MsgList.AddObject ('wm_SetIcon', TObject($0080));
  MsgList.AddObject ('wm_NCCreate', TObject($0081));
  MsgList.AddObject ('wm_NCDestroy', TObject($0082));
  MsgList.AddObject ('wm_NCCalcSize', TObject($0083));
  MsgList.AddObject ('wm_NCHitTest', TObject($0084));
  MsgList.AddObject ('wm_NCPaint', TObject($0085));
  MsgList.AddObject ('wm_NCActivate', TObject($0086));
  MsgList.AddObject ('wm_GetDlgCode', TObject($0087));
  MsgList.AddObject ('wm_NCMouseMove', TObject($00A0));
  MsgList.AddObject ('wm_NCLButtonDown', TObject($00A1));
  MsgList.AddObject ('wm_NCLButtonUp', TObject($00A2));
  MsgList.AddObject ('wm_NCLButtonDblClk', TObject($00A3));
  MsgList.AddObject ('wm_NCRButtonDown', TObject($00A4));
  MsgList.AddObject ('wm_NCRButtonUp', TObject($00A5));
  MsgList.AddObject ('wm_NCRButtonDblClk', TObject($00A6));
  MsgList.AddObject ('wm_NCMButtonDown', TObject($00A7));
  MsgList.AddObject ('wm_NCMButtonUp', TObject($00A8));
  MsgList.AddObject ('wm_NCMButtonDblClk', TObject($00A9));
  MsgList.AddObject ('wm_KeyDown', TObject($0100));
  MsgList.AddObject ('wm_KeyUp', TObject($0101));
  MsgList.AddObject ('wm_Char', TObject($0102));
  MsgList.AddObject ('wm_DeadChar', TObject($0103));
  MsgList.AddObject ('wm_SysKeyDown', TObject($0104));
  MsgList.AddObject ('wm_SysKeyUp', TObject($0105));
  MsgList.AddObject ('wm_SysChar', TObject($0106));
  MsgList.AddObject ('wm_SysDeadChar', TObject($0107));
  MsgList.AddObject ('wm_InitDialog', TObject($0110));
  MsgList.AddObject ('wm_Command', TObject($0111));
  MsgList.AddObject ('wm_SysCommand', TObject($0112));
  MsgList.AddObject ('wm_Timer', TObject($0113));
  MsgList.AddObject ('wm_HScroll', TObject($0114));
  MsgList.AddObject ('wm_VScroll', TObject($0115));
  MsgList.AddObject ('wm_InitMenu', TObject($0116));
  MsgList.AddObject ('wm_InitMenuPopup', TObject($0117));
  MsgList.AddObject ('wm_MenuSelect', TObject($011F));
  MsgList.AddObject ('wm_MenuChar', TObject($0120));
  MsgList.AddObject ('wm_EnterIdle', TObject($0121));
  MsgList.AddObject ('wm_CtlColorMsgbox', TObject($0132));
  MsgList.AddObject ('wm_CtlColorEdit', TObject($0133));
  MsgList.AddObject ('wm_CtlColorListbox', TObject($0134));
  MsgList.AddObject ('wm_CtlColorBtn', TObject($0135));
  MsgList.AddObject ('wm_CtlColorDlg', TObject($0136));
  MsgList.AddObject ('wm_CtlColorScrollbar', TObject($0137));
  MsgList.AddObject ('wm_CtlColorStatic', TObject($0138));
  MsgList.AddObject ('wm_MouseMove', TObject($0200));
  MsgList.AddObject ('wm_LButtonDown', TObject($0201));
  MsgList.AddObject ('wm_LButtonUp', TObject($0202));
  MsgList.AddObject ('wm_LButtonDblClk', TObject($0203));
  MsgList.AddObject ('wm_RButtonDown', TObject($0204));
  MsgList.AddObject ('wm_RButtonUp', TObject($0205));
  MsgList.AddObject ('wm_RButtonDblClk', TObject($0206));
  MsgList.AddObject ('wm_MButtonDown', TObject($0207));
  MsgList.AddObject ('wm_MButtonUp', TObject($0208));
  MsgList.AddObject ('wm_MButtonDblClk', TObject($0209));
  MsgList.AddObject ('wm_ParentNotify', TObject($0210));
  MsgList.AddObject ('wm_MDICreate', TObject($0220));
  MsgList.AddObject ('wm_MDIDestroy', TObject($0221));
  MsgList.AddObject ('wm_MDIActivate', TObject($0222));
  MsgList.AddObject ('wm_MDIRestore', TObject($0223));
  MsgList.AddObject ('wm_MDINext', TObject($0224));
  MsgList.AddObject ('wm_MDIMaximize', TObject($0225));
  MsgList.AddObject ('wm_MDITile', TObject($0226));
  MsgList.AddObject ('wm_MDICascade', TObject($0227));
  MsgList.AddObject ('wm_MDIIconArrange', TObject($0228));
  MsgList.AddObject ('wm_MDIGetActive', TObject($0229));
  MsgList.AddObject ('wm_MDISetMenu', TObject($0230));
  MsgList.AddObject ('wm_DropFiles', TObject($0233));
  MsgList.AddObject ('wm_MDIRefreshMenu', TObject($0234));
  MsgList.AddObject ('wm_Cut', TObject($0300));
  MsgList.AddObject ('wm_Copy', TObject($0301));
  MsgList.AddObject ('wm_Paste', TObject($0302));
  MsgList.AddObject ('wm_Clear', TObject($0303));
  MsgList.AddObject ('wm_Undo', TObject($0304));
  MsgList.AddObject ('wm_RenderFormat', TObject($0305));
  MsgList.AddObject ('wm_RenderAllFormats', TObject($0306));
  MsgList.AddObject ('wm_DestroyClipboard', TObject($0307));
  MsgList.AddObject ('wm_DrawClipboard', TObject($0308));
  MsgList.AddObject ('wm_PaintClipboard', TObject($0309));
  MsgList.AddObject ('wm_VScrollClipboard', TObject($030A));
  MsgList.AddObject ('wm_SizeClipboard', TObject($030B));
  MsgList.AddObject ('wm_AskCBFormatName', TObject($030C));
  MsgList.AddObject ('wm_ChangeCBChain', TObject($030D));
  MsgList.AddObject ('wm_HScrollClipboard', TObject($030E));
  MsgList.AddObject ('wm_QueryNewPalette', TObject($030F));
  MsgList.AddObject ('wm_PaletteIsChanging', TObject($0310));
  MsgList.AddObject ('wm_PaletteChanged', TObject($0311));
end.

object Form2: TForm2
  Left = 432
  Top = 115
  Width = 288
  Height = 300
  Caption = 'Message Viewer'
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'MS Sans Serif'
  Font.Style = []
  PixelsPerInch = 96
  TextHeight = 13
  object ListBox1: TListBox
    Left = 0
    Top = 0
    Width = 280
    Height = 273
    Align = alClient
    ItemHeight = 13
    TabOrder = 0
  end
end

unit ViewMsg;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls;

type
  TForm2 = class(TForm)
    ListBox1: TListBox;
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form2: TForm2;

implementation

{$R *.DFM}

end.

object Form1: TForm1
  Left = 153
  Top = 114
  Width = 276
  Height = 265
  Caption = 'Demo Form'
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'MS Sans Serif'
  Font.Style = []
  Visible = True
  PixelsPerInch = 96
  TextHeight = 13
end

unit WndProForm;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls;

type
  TForm1 = class(TForm)
  private
    Last: Integer;
  public
    procedure WndProc (var Message: TMessage); override;
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

uses
  ViewMsg, MList;

procedure TForm1.WndProc (var Message: TMessage);
begin
  if not (Message.Msg = Last) then
  begin
    with Form2.Listbox1 do
      ItemIndex := Items.Add (GetMessageName (Message.Msg));
    Last := Message.Msg;
  end;
  inherited WndProc (Message);
end;

end.

program WProc;

uses
  Forms,
  Mlist in 'Mlist.pas',
  ViewMsg in 'ViewMsg.pas' {Form2},
  WndProForm in 'WndProForm.pas' {Form1};

{$R *.RES}

begin
  Application.CreateForm(TForm2, Form2);
  Application.CreateForm(TForm1, Form1);
  Application.Run;
end.