Krdytkyu

I have made a small and simple tool for Windows using C++ and the Win32 API to allow people to change their resolution in Fortnite, without having to search for the configuration file and manually edit it themselves. The program has a width and height input for the user to enter their desired resolution, and an apply button to save the changes to the configuration file. I have tested it on a few machines, and it seems to work as expected.

This is my first attempt at using C++ or the Win32 API, and I would love to release this project to the Fortnite community, but I want ensure there are no glaring issues with it.

My questions/concerns are:

1. Have I deleted the system resources correctly? Any potential memory leaks? (brushes, fonts, etc)


2. Do I need more error handling? Any improvements on what I do have?


3. Should I separate the GetFortniteConfiguration(), SetFortniteConfiguration() and CenterWindow() functions into their own file or is the project small enough to keep it as is?

I will also be adding comments to the code shortly, but any other tips, suggestions or learning resources are welcome.

#include <stdio.h>

#include <sys/stat.h>

#include <windows.h>

#include <string>



#include "alphares.h"

#include "resources.h"

#include "simpleini/simpleini.h"



LRESULT CALLBACK WindowProc(

    HWND hwnd,

    UINT message,

    WPARAM wParam,

    LPARAM lParam);



void CenterWindow(HWND window, DWORD style, DWORD exStyle) {

    int screen_width = GetSystemMetrics(SM_CXSCREEN);

    int screen_height = GetSystemMetrics(SM_CYSCREEN);

    RECT client_rect;



    GetClientRect(window, &client_rect);

    AdjustWindowRectEx(&client_rect, style, FALSE, exStyle);



    int client_width = client_rect.right - client_rect.left;

    int client_height = client_rect.bottom - client_rect.top;



    SetWindowPos(window, NULL,

        screen_width / 2 - client_width / 2,

        screen_height / 2 - client_height / 2,

        client_width, client_height, 0);

}



int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE, PWSTR pCmdLine, int nCmdShow) {

    const wchar_t CLASS_NAME = L"alphares";

    const wchar_t WINDOW_NAME = L"alphares";



    WNDCLASS wc = { };

    MSG message = { };



    wc.lpfnWndProc = WindowProc;

    wc.hInstance = hInstance;

    wc.hbrBackground = CreateSolidBrush(RGB(43, 45, 92));

    wc.hIcon = LoadIcon(wc.hInstance, MAKEINTRESOURCE(IDR_ICON));

    wc.lpszClassName = CLASS_NAME;



    if (!RegisterClass(&wc)) {

        return 0;

    }



    HWND hwnd = CreateWindowEx(

        0,

        CLASS_NAME,

        WINDOW_NAME,

        WS_OVERLAPPEDWINDOW&~WS_MAXIMIZEBOX^WS_THICKFRAME,

        CW_USEDEFAULT, CW_USEDEFAULT, 250, 150,

        NULL,

        NULL,

        hInstance,

        NULL);



    CenterWindow(hwnd, WS_OVERLAPPEDWINDOW&~WS_MAXIMIZEBOX^WS_THICKFRAME, 0);



    if (hwnd == NULL) {

        return 0;

    }



    ShowWindow(hwnd, nCmdShow);

    UpdateWindow(hwnd);



    while (GetMessage(&message, NULL, 0, 0)) {

        if (!IsDialogMessage(hwnd, &message)) {

            TranslateMessage(&message);

            DispatchMessage(&message);

        }

    }

    return 0;

}



LPCSTR GetFortniteConfiguration() {

    char *path;

    size_t length;

    _dupenv_s(&path, &length, "LOCALAPPDATA");

    std::string fortnite = "\FortniteGame\Saved\Config\WindowsClient\GameUserSettings.ini";

    std::string fullpath = path + fortnite;

    free(path);



    return fullpath.c_str();

}



void SetFortniteConfiguration(LPCSTR file, int user_width, int user_height) {

    std::string width_string = std::to_string(user_width);

    std::string height_string = std::to_string(user_height);

    char const *width = width_string.c_str();

    char const *height = height_string.c_str();



    DWORD attributes = GetFileAttributesA(file);



    if (attributes & FILE_ATTRIBUTE_READONLY) {

        attributes &= ~FILE_ATTRIBUTE_READONLY;

        SetFileAttributesA(file, attributes);

    }



    const char *section = "/Script/FortniteGame.FortGameUserSettings";



    CSimpleIniA ini;

    ini.SetSpaces(false);

    ini.SetUnicode();

    ini.LoadFile(file);



    ini.SetValue(section, "ResolutionSizeX", width);

    ini.SetValue(section, "ResolutionSizeY", height);

    ini.SetValue(section, "LastUserConfirmedResolutionSizeX", width);

    ini.SetValue(section, "LastUserConfirmedResolutionSizeY", height);

    ini.SetValue(section, "DesiredScreenWidth", width);

    ini.SetValue(section, "DesiredScreenHeight", height);

    ini.SetValue(section, "LastUserConfirmedDesiredScreenWidth", width);

    ini.SetValue(section, "LastUserConfirmedDesiredScreenHeight", height);



    ini.SaveFile(file);

}



LRESULT CALLBACK WindowProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) {

    NONCLIENTMETRICS ncm;

    ncm.cbSize = sizeof(ncm);

    SystemParametersInfo(SPI_GETNONCLIENTMETRICS, sizeof(ncm), &ncm, 0);



    HINSTANCE hInstance;

    static HFONT hFont = CreateFontIndirect(&ncm.lfMessageFont);

    static HBRUSH hBrushStatic = CreateSolidBrush(RGB(43, 45, 92));

    static HBRUSH hBrushEdit = CreateSolidBrush(RGB(35, 35, 79));

    static HBRUSH hBrushButton = CreateSolidBrush(RGB(93, 107, 238));



    switch (message) {

    case WM_CREATE:

        hInstance = GetModuleHandle(nullptr);



        CreateWindowEx(

            NULL,

            TEXT("Static"),

            TEXT("Width"),

            WS_CHILD | WS_VISIBLE | ES_CENTER,

            50, 15, 60, 20,

            hwnd,

            (HMENU)IDC_WIDTH_LABEL,

            hInstance,

            NULL);



        SendMessage(

            GetDlgItem(hwnd, IDC_WIDTH_LABEL),

            WM_SETFONT,

            (WPARAM)hFont,

            TRUE);



        CreateWindowEx(

            NULL,

            TEXT("Static"),

            TEXT("Height"),

            WS_CHILD | WS_VISIBLE | ES_CENTER,

            125, 15, 60, 20,

            hwnd,

            (HMENU)IDC_HEIGHT_LABEL,

            hInstance,

            NULL);



        SendMessage(

            GetDlgItem(hwnd, IDC_HEIGHT_LABEL),

            WM_SETFONT,

            (WPARAM)hFont,

            TRUE);



        CreateWindowEx(

            NULL,

            TEXT("Edit"),

            TEXT("1920"),

            WS_CHILD | WS_VISIBLE | ES_NUMBER | ES_CENTER | WS_TABSTOP,

            50, 35, 60, 15,

            hwnd,

            (HMENU)IDC_WIDTH_EDIT,

            hInstance,

            NULL);



        SendMessage(

            GetDlgItem(hwnd, IDC_WIDTH_EDIT),

            WM_SETFONT,

            (WPARAM)hFont,

            TRUE);



        SendMessage(

            GetDlgItem(hwnd, IDC_HEIGHT_EDIT),

            EM_SETLIMITTEXT,

            4, 0);



        CreateWindowEx(

            NULL,

            TEXT("Edit"),

            TEXT("1080"),

            WS_CHILD | WS_VISIBLE | ES_NUMBER | ES_CENTER | WS_TABSTOP,

            125, 35, 60, 15,

            hwnd,

            (HMENU)IDC_HEIGHT_EDIT,

            hInstance,

            NULL);



        SendMessage(

            GetDlgItem(hwnd, IDC_HEIGHT_EDIT),

            WM_SETFONT,

            (WPARAM)hFont,

            TRUE);



        SendMessage(

            GetDlgItem(hwnd, IDC_WIDTH_EDIT),

            EM_SETLIMITTEXT,

            4, 0);



        CreateWindowEx(

            NULL,

            TEXT("Button"),

            TEXT("Apply"),

            WS_CHILD | WS_VISIBLE | BS_OWNERDRAW,

            50, 65, 135, 25,

            hwnd,

            (HMENU)IDC_APPLY_BUTTON,

            hInstance,

            NULL);



        SendMessage(

            GetDlgItem(hwnd, IDC_APPLY_BUTTON),

            WM_SETFONT,

            (WPARAM)hFont,

            TRUE);



        break;



    case WM_CTLCOLORSTATIC:

    {

        HDC hdcStatic = (HDC)wParam;

        SetTextColor(hdcStatic, RGB(93, 107, 238));

        SetBkColor(hdcStatic, RGB(43, 45, 92));

        return (INT_PTR)hBrushStatic;

    }



    case WM_CTLCOLOREDIT:

    {

        HDC hdcEdit = (HDC)wParam;

        SetTextColor(hdcEdit, RGB(255, 255, 255));

        SetBkColor(hdcEdit, RGB(35, 35, 79));

        return (INT_PTR)hBrushEdit;

    }



    case WM_CTLCOLORBTN:

    {

        HDC hdcButton = (HDC)wParam;

        SetTextColor(hdcButton, RGB(255, 255, 255));

        SetBkColor(hdcButton, RGB(93, 107, 238));

        return (INT_PTR)hBrushButton;

    }



    case WM_COMMAND:

        if (LOWORD(wParam) == IDC_APPLY_BUTTON) {

            LPCSTR file = GetFortniteConfiguration();

            struct stat buffer;



            if (stat(file, &buffer) == 0) {

                BOOL success;



                int width = GetDlgItemInt(

                    hwnd,

                    IDC_WIDTH_EDIT,

                    &success,

                    FALSE);



                int height = GetDlgItemInt(

                    hwnd,

                    IDC_HEIGHT_EDIT,

                    &success,

                    FALSE);



                if (success == TRUE) {

                    SetFortniteConfiguration(file, width, height);



                    MessageBoxA(

                        hwnd,

                        "Your resolution was successfully saved.",

                        "Success",

                        MB_OK);

                } else {

                    MessageBoxA(

                        hwnd,

                        "Please enter a resolution.",

                        "Warning",

                        MB_OK | MB_ICONWARNING);

                }

            } else {

                MessageBoxA(

                    hwnd,

                    "There was an error finding your configuration file.",

                    "Error",

                    MB_OK | MB_ICONERROR);

            }

        }

        break;



    case WM_DRAWITEM:

        if (wParam == IDC_APPLY_BUTTON) {

            LPDRAWITEMSTRUCT pdis = (LPDRAWITEMSTRUCT)lParam;

            RECT rect = pdis->rcItem;



            DrawTextA(

                pdis->hDC,

                "Apply",

                5,

                &rect,

                DT_CENTER | DT_SINGLELINE | DT_VCENTER);



            return TRUE;

        }

        break;



    case WM_DESTROY:

        DeleteObject(hFont);

        DeleteObject(hBrushStatic);

        DeleteObject(hBrushEdit);

        DeleteObject(hBrushButton);

        PostQuitMessage(0);

        return 0;



    case WM_PAINT:

    {

        PAINTSTRUCT ps;

        HDC hdc = BeginPaint(hwnd, &ps);

        EndPaint(hwnd, &ps);

        break;

    }

    return 0;

    }

    return DefWindowProc(hwnd, message, wParam, lParam);

}