创建窗口时设置大小和位置

#include <windows.h>

LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) {
    switch (msg) {
        case WM_DESTROY:
            PostQuitMessage(0);
            return 0;
    }
    return DefWindowProc(hwnd, msg, wParam, lParam);
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
    const char* className = "SampleWindowClass";
    WNDCLASS wc = {0};
    wc.lpfnWndProc = WndProc;
    wc.hInstance = hInstance;
    wc.lpszClassName = className;
    RegisterClass(&wc);

    int width = 800;
    int height = 600;
    int x = (GetSystemMetrics(SM_CXSCREEN) - width) / 2;
    int y = (GetSystemMetrics(SM_CYSCREEN) - height) / 2;

    HWND hwnd = CreateWindowEx(
        0,                      // Optional window styles.
        className,              // Window class
        "Learn to Program Windows", // Window text
        WS_OVERLAPPEDWINDOW,    // Window style
        x, y,                    // Position (x, y)
        width, height,           // Size (width, height)
        NULL,                    // Parent window    
        NULL,                    // Menu
        hInstance,              // Instance handle
        NULL                    // Additional application data
    );

    if (hwnd == NULL) {
        return 0;
    }

    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);

    MSG msg = {0};
    while (GetMessage(&msg, NULL, 0, 0)) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return (int) msg.wParam;
}

#include <QApplication>
#include <QWidget>

int main(int argc, char *argv[]) {
    QApplication app(argc, argv);

    QWidget window;
    window.resize(800, 600);  // 设置窗口大小
    window.move((QApplication::desktop()->width() - window.width()) / 2, (QApplication::desktop()->height() - window.height()) / 2);  // 设置窗口位置
    window.show();

    return app.exec();
}

import tkinter as tk

root = tk.Tk()
root.geometry("800x600+100+100")  # 设置窗口大小和位置
root.mainloop()

const { app, BrowserWindow } = require('electron');

function createWindow () {
    const win = new BrowserWindow({
        width: 800,
        height: 600,
        x: (process.platform === 'darwin') ? 0 : (screen.width - 800) / 2,
        y: (process.platform === 'darwin') ? 22 : (screen.height - 600) / 2,
        webPreferences: {
            nodeIntegration: true
        }
    });

    win.loadFile('index.html');
}

app.whenReady().then(createWindow);