# Cppcheck report - LibreOffice: dbaccess/win32/source/odbcconfig/odbcconfig.cxx

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    /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
    /*
     * This file is part of the LibreOffice project.
     *
     * This Source Code Form is subject to the terms of the Mozilla Public
     * License, v. 2.0. If a copy of the MPL was not distributed with this
     * file, You can obtain one at http://mozilla.org/MPL/2.0/.
     *
     * This file incorporates work covered by the following license notice:
     *
     *   Licensed to the Apache Software Foundation (ASF) under one or more
     *   contributor license agreements. See the NOTICE file distributed
     *   with this work for additional information regarding copyright
     *   ownership. The ASF licenses this file to you under the Apache
     *   License, Version 2.0 (the "License"); you may not use this file
     *   except in compliance with the License. You may obtain a copy of
     *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
     */

    #ifndef __cplusplus
    #error Need C++ to compile
    #endif

    #define UNICODE
    #define _UNICODE
    #include <tchar.h>

    #ifdef _MSC_VER
    #pragma warning(push, 1)
    #pragma warning(disable:4005)
    #endif

    #include <windows.h>
    #include <shellapi.h>
    #include <sqlext.h>

    #ifdef _MSC_VER
    #pragma warning(pop)
    #endif

    // the name of the library which contains the SQLManageDataSources function
    #define ODBC_UI_LIB_NAME    L"ODBCCP32.DLL"

    // the signature of the SQLManageDataSources function
    typedef SQLRETURN (SQL_API* TSQLManageDataSource) (SQLHWND hwndParent);

    // displays the error text for the last error (GetLastError), and returns this error value
    int displayLastError()
    {
        DWORD   dwError = GetLastError();

        LPVOID lpMsgBuf;
        FormatMessage(
            FORMAT_MESSAGE_ALLOCATE_BUFFER |
            FORMAT_MESSAGE_FROM_SYSTEM,
            NULL,
            dwError,
            MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
            (LPTSTR)&lpMsgBuf,
            0,
            NULL
        );

        // Display the string.
        MessageBox( NULL, (LPCTSTR)lpMsgBuf, NULL, MB_OK | MB_ICONERROR );

        // Free the buffer.
        LocalFree( lpMsgBuf );

        return dwError;
    }

    /** registers the window class for our application's main window
    */
    BOOL registerWindowClass( HINSTANCE _hAppInstance )
    {
        WNDCLASSEX wcx;

        wcx.cbSize = sizeof(wcx);                   // size of structure
        wcx.style = CS_HREDRAW | CS_VREDRAW;        // redraw if size changes
        wcx.lpfnWndProc = DefWindowProc;            // points to window procedure
        wcx.cbClsExtra = 0;                         // no extra class memory
        wcx.cbWndExtra = 0;                         // no extra window memory
        wcx.hInstance = _hAppInstance;              // handle to instance
        wcx.hIcon = NULL;                           // predefined app. icon
        wcx.hCursor = NULL;                         // predefined arrow
        wcx.hbrBackground = NULL;                   // no background brush
        wcx.lpszMenuName =  NULL;                   // name of menu resource
        wcx.lpszClassName = L"ODBCConfigMainClass"; // name of window class
        wcx.hIconSm = NULL;                         // small class icon

        return ( !!RegisterClassEx( &wcx ) );
    }

    /// initializes the application instances
    HWND initInstance( HINSTANCE _hAppInstance )
    {
        HWND hWindow = CreateWindow(
            L"ODBCConfigMainClass", // name of window class
            L"ODBC Config Wrapper", // title-bar string
            WS_OVERLAPPEDWINDOW,    // top-level window
            CW_USEDEFAULT,          // default horizontal position
            CW_USEDEFAULT,          // default vertical position
            CW_USEDEFAULT,          // default width
            CW_USEDEFAULT,          // default height
            (HWND) NULL,            // no owner window
            (HMENU) NULL,           // use class menu
            _hAppInstance,          // handle to application instance
            (LPVOID) NULL);         // no window-creation data

        // don't show the window, we only need it as parent handle for the
        // SQLManageDataSources function
        return hWindow;
    }

    // main window function
    #ifdef __MINGW32__
    extern "C" int APIENTRY WinMain( HINSTANCE _hAppInstance, HINSTANCE, LPSTR, int )
    #else
    extern "C" int APIENTRY _tWinMain( HINSTANCE _hAppInstance, HINSTANCE, LPTSTR, int )<--- The function '_tWinMain' is never used.
    #endif
    {
        if ( !registerWindowClass( _hAppInstance ) )
            return FALSE;

        HWND hAppWindow = initInstance( _hAppInstance );
        if ( !IsWindow( hAppWindow ) )
            return displayLastError();

        HMODULE hModule = LoadLibraryW( ODBC_UI_LIB_NAME );
        if ( hModule == NULL )
            hModule = LoadLibraryExW( ODBC_UI_LIB_NAME, NULL, LOAD_WITH_ALTERED_SEARCH_PATH );
        if ( hModule == NULL )
            return displayLastError();

        FARPROC pManageDSProc = GetProcAddress( hModule, "SQLManageDataSources" );
        if ( pManageDSProc == NULL )
            return displayLastError();

        TSQLManageDataSource pManageDS = (TSQLManageDataSource)pManageDSProc;
        if ( !( (*pManageDS)( hAppWindow ) ) )
            return displayLastError();

        FreeLibrary( hModule );

        return 0;
    }

    /* vim:set shiftwidth=4 softtabstop=4 expandtab: */