// MessageId: ERROR_SUCCESS
//
// MessageText:
//
//  The operation completed successfully.
//
#define ERROR_SUCCESS                    0L

#define NO_ERROR 0L                            // dderror

//
// MessageId: ERROR_INVALID_FUNCTION
//
// MessageText:
//
//  Incorrect function.
//
#define ERROR_INVALID_FUNCTION           1L    // dderror

//
// MessageId: ERROR_FILE_NOT_FOUND
//
// MessageText:
//
//  The system cannot find the file specified.
//
#define ERROR_FILE_NOT_FOUND             2L

//
// MessageId: ERROR_PATH_NOT_FOUND
//
// MessageText:
//
//  The system cannot find the path specified.
//
#define ERROR_PATH_NOT_FOUND             3L

//
// MessageId: ERROR_TOO_MANY_OPEN_FILES
//
// MessageText:
//
//  The system cannot open the file.
//
#define ERROR_TOO_MANY_OPEN_FILES        4L

//
// MessageId: ERROR_ACCESS_DENIED
//
// MessageText:
//
//  Access is denied.
//
#define ERROR_ACCESS_DENIED              5L

DWORD FormatMessage(
  DWORD dwFlags,      // source and processing options
  LPCVOID lpSource,   // pointer to  message source
  DWORD dwMessageId,  // requested message identifier
  DWORD dwLanguageId, // language identifier for requested message
  LPTSTR lpBuffer,    // pointer to message buffer
  DWORD nSize,        // maximum size of message buffer
  va_list *Arguments  // pointer to array of message inserts
);

VOID SetLastError(DWORD dwErrCode);

   //Get the error code
   DWORD dwError = GetDlgItemInt(hwnd, IDC_ERRORCODE, NULL, FALSE);
   
   //Buffer that gets the error message string
   HLOCAL hlocal = NULL;   

   //Get the error code's textual description
   BOOL fOk = FormatMessage(
      FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER, 
      NULL, dwError, MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US), 
      (PTSTR)&hlocal, 0, NULL);
   .
   .
   .

   if (hlocal != NULL)
   {
      SetDlgItemText(hwnd, IDC_ERRORTEXT, (PCTSTR)LocalLock(hlocal));
      LocalFree(hlocal);
   } 
   else 
      SetDlgItemText(hwnd, IDC_ERRORTEXT, 
         TEXT("Error number not found."));

/******************************************************************************
Module:  ErrorShow.cpp
Notices: Copyright (c) 2000 Jeffrey Richter
******************************************************************************/

#include "..\CmnHdr.h"     /* See Appendix A. */
#include <Windowsx.h>
#include <tchar.h>
#include "Resource.h"

///////////////////////////////////////////////////////////////////////////////

#define ESM_POKECODEANDLOOKUP    (WM_USER + 100)
const TCHAR g_szAppName[] = TEXT("Error Show");

///////////////////////////////////////////////////////////////////////////////

BOOL Dlg_OnInitDialog(HWND hwnd, HWND hwndFocus, LPARAM lParam) 
{
   chSETDLGICONS(hwnd, IDI_ERRORSHOW);

   // Don't accept error codes more than 5 digits long
   Edit_LimitText(GetDlgItem(hwnd, IDC_ERRORCODE), 5);

   // Look up the command-line passed error number
   SendMessage(hwnd, ESM_POKECODEANDLOOKUP, lParam, 0);
   return(TRUE);
}

///////////////////////////////////////////////////////////////////////////////

void Dlg_OnCommand(HWND hwnd, int id, HWND hwndCtl, UINT codeNotify)
{
   switch (id) 
   {

   case IDCANCEL:
      EndDialog(hwnd, id);
      break;

   case IDC_ALWAYSONTOP:
      SetWindowPos(hwnd, IsDlgButtonChecked(hwnd, IDC_ALWAYSONTOP) 
         ? HWND_TOPMOST : HWND_NOTOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE);
      break;

   case IDC_ERRORCODE: 
      EnableWindow(GetDlgItem(hwnd, IDOK), Edit_GetTextLength(hwndCtl) > 0);
      break;

   case IDOK:
      // Get the error code
      DWORD dwError = GetDlgItemInt(hwnd, IDC_ERRORCODE, NULL, FALSE);

      HLOCAL hlocal = NULL;   // Buffer that gets the error message string

      // Get the error code's textual description
      BOOL fOk = FormatMessage(
         FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER, 
         NULL, dwError, MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US), 
         (PTSTR) &hlocal, 0, NULL);

      if (!fOk) 
      {
         // Is it a network-related error?
         HMODULE hDll = LoadLibraryEx(TEXT("netmsg.dll"), NULL, 
            DONT_RESOLVE_DLL_REFERENCES);

         if (hDll != NULL) 
         {
            FormatMessage(
               FORMAT_MESSAGE_FROM_HMODULE | FORMAT_MESSAGE_FROM_SYSTEM,
               hDll, dwError, MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US),
               (PTSTR) &hlocal, 0, NULL);
            FreeLibrary(hDll);
         }
      }

      if (hlocal != NULL) 
      {
         SetDlgItemText(hwnd, IDC_ERRORTEXT, (PCTSTR) LocalLock(hlocal));
         LocalFree(hlocal);
      } 
      else 
      {
         SetDlgItemText(hwnd, IDC_ERRORTEXT, TEXT("Error number not found."));
      }
      break;
   }
}

///////////////////////////////////////////////////////////////////////////////

INT_PTR WINAPI Dlg_Proc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
   switch (uMsg) 
   {
      chHANDLE_DLGMSG(hwnd, WM_INITDIALOG, Dlg_OnInitDialog);
      chHANDLE_DLGMSG(hwnd, WM_COMMAND,    Dlg_OnCommand);

   case ESM_POKECODEANDLOOKUP:
      SetDlgItemInt(hwnd, IDC_ERRORCODE, (UINT) wParam, FALSE);
      FORWARD_WM_COMMAND(hwnd, IDOK, GetDlgItem(hwnd, IDOK), BN_CLICKED, 
         PostMessage);
      SetForegroundWindow(hwnd);
      break;
   }

   return(FALSE);
}

///////////////////////////////////////////////////////////////////////////////

int WINAPI _tWinMain(HINSTANCE hinstExe, HINSTANCE, PTSTR pszCmdLine, int)
{
   HWND hwnd = FindWindow(TEXT("#32770"), TEXT("Error Show"));
   if (IsWindow(hwnd)) 
   {
      // An instance is already running, activate it and send it the new #
      SendMessage(hwnd, ESM_POKECODEANDLOOKUP, _ttoi(pszCmdLine), 0);
   } 
   else 
   {
      DialogBoxParam(hinstExe, MAKEINTRESOURCE(IDD_ERRORSHOW), 
         NULL, Dlg_Proc, _ttoi(pszCmdLine));
   }
   return(0);
}

//////////////////////////////// End of File //////////////////////////////////

//ErrorShow.rc Microsoft Developer Studio generated resource script.
//
#include "resource.h"

#define APSTUDIO_READONLY_SYMBOLS
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 2 resource.
//
#include "afxres.h"

/////////////////////////////////////////////////////////////////////////////
#undef APSTUDIO_READONLY_SYMBOLS

/////////////////////////////////////////////////////////////////////////////
// English (U.S.) resources

#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
#ifdef _WIN32
LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
#pragma code_page(1252)
#endif //_WIN32

/////////////////////////////////////////////////////////////////////////////
//
// Dialog
//
IDD_ERRORSHOW DIALOGEX 0, 0, 182, 42
STYLE DS_SETFOREGROUND | DS_3DLOOK | DS_CENTER | WS_MINIMIZEBOX | WS_VISIBLE | 
    WS_CAPTION | WS_SYSMENU
CAPTION "Error Show"
FONT 8, "MS Sans Serif"
BEGIN
    LTEXT           "Error:",IDC_STATIC,4,4,19,8
    EDITTEXT        IDC_ERRORCODE,24,2,24,14,ES_AUTOHSCROLL | ES_NUMBER
    DEFPUSHBUTTON   "Look up",IDOK,56,2,36,14
    CONTROL         "&On top",IDC_ALWAYSONTOP,"Button",BS_AUTOCHECKBOX | 
                    WS_TABSTOP,104,4,38,10
    EDITTEXT        IDC_ERRORTEXT,4,20,176,20,ES_MULTILINE | ES_AUTOVSCROLL | 
                    ES_READONLY | NOT WS_BORDER | WS_VSCROLL,
                    WS_EX_CLIENTEDGE
END
/////////////////////////////////////////////////////////////////////////////
//
// DESIGNINFO
//
#ifdef APSTUDIO_INVOKED
GUIDELINES DESIGNINFO DISCARDABLE 
BEGIN
    IDD_ERRORSHOW, DIALOG
    BEGIN
        LEFTMARGIN, 7
        RIGHTMARGIN, 175
        TOPMARGIN, 7
        BOTTOMMARGIN, 35
    END
END
#endif    // APSTUDIO_INVOKED
#ifdef APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// TEXTINCLUDE
//
1 TEXTINCLUDE DISCARDABLE 
BEGIN
    "resource.h\0"
END
2 TEXTINCLUDE DISCARDABLE 
BEGIN
    "#include ""afxres.h""\r\n"
    "\0"
END
3 TEXTINCLUDE DISCARDABLE 
BEGIN
    "\r\n"
    "\0"
END
#endif    // APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// Icon
//
// Icon with lowest ID value placed first to ensure application icon
// remains consistent on all systems.
IDI_ERRORSHOW           ICON    DISCARDABLE     "ErrorShow.ico"
#endif    // English (U.S.) resources
/////////////////////////////////////////////////////////////////////////////
#ifndef APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 3 resource.
//
/////////////////////////////////////////////////////////////////////////////
#endif    // not APSTUDIO_INVOKED

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