win32加qt怎么为窗口添加边框和通过鼠标更改窗口大小

您好，关于win32和QT的窗口开发问题，可以通过以下步骤为窗口添加边框和通过鼠标更改窗口大小：

1. 为窗口添加边框
使用QT的QMainWindow类可以很方便地实现窗口边框的添加。您可以在创建主窗口时设置其窗口样式为Qt::CustomizeWindowHint指定，然后在重写paintEvent方法时绘制边框、标题栏、按钮等元素。例如：

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    // 设置窗口样式
    setWindowFlags(Qt::CustomizeWindowHint | Qt::WindowMinimizeButtonHint | Qt::WindowMaximizeButtonHint | Qt::WindowTitleHint);
    setWindowTitle(tr("My Window"));

    // 设置边框颜色和宽度
    QPalette palette;
    palette.setColor(QPalette::Window, QColor(240, 240, 240));
    setPalette(palette);
    setStyleSheet(QString::fromUtf8("QMainWindow { border: 1px solid #ccc; }"));
}

void MainWindow::paintEvent(QPaintEvent *event)
{
    // 绘制边框和标题栏
    Q_UNUSED(event);

    QPainter painter(this);
    painter.setPen(QColor("#ccc"));
    painter.drawLine(QPoint(0, 0), QPoint(0, height()));
    painter.drawLine(QPoint(0, 0), QPoint(width(), 0));
    painter.drawLine(QPoint(0, height() - 1), QPoint(width(), height() - 1));
    painter.drawLine(QPoint(width() - 1, 0), QPoint(width() - 1, height()));
    painter.drawRect(QRect(0, 0, width() - 1, height() - 1));
    painter.setBrush(QColor("#f5f5f5"));
    painter.drawRect(QRect(1, 1, width() - 2, 28));

    // 绘制标题
    painter.setFont(QFont("Microsoft Yahei", 12));
    painter.setPen(QColor("#333"));
    painter.drawText(QRect(10, 5, width() - 20, 20), Qt::AlignLeft | Qt::AlignVCenter, windowTitle());
}

2. 通过鼠标更改窗口大小
可以在QT的main.cpp文件中添加以下代码，实现通过鼠标拖动窗口边框改变窗口大小的功能。具体实现可以在QWindows类中重写mousePressEvent、mouseMoveEvent和mouseReleaseEvent三个方法，以实现鼠标移动时改变窗口大小的效果。

#include <windows.h>
#include <windowsx.h>

void mousePressEvent(QMouseEvent *event)
{
    if (event->button() == Qt::LeftButton)
    {
        HWND hWnd = HWND(winId());
        if (hWnd)
        {
            int xPos = GET_X_LPARAM(event->globalPos().x());
            int yPos = GET_Y_LPARAM(event->globalPos().y());
            POINT pt = { xPos, yPos };
            ScreenToClient(hWnd, &pt);
            SetCapture(hWnd);
            SendMessage(hWnd, WM_NCLBUTTONDOWN, HTBOTTOMRIGHT, MAKELPARAM(pt.x, pt.y));
        }
    }
}

void mouseMoveEvent(QMouseEvent *event)
{
    HWND hWnd = HWND(winId());
    if (hWnd && (GetCapture() == hWnd))
    {
        int xPos = GET_X_LPARAM(event->globalPos().x());
        int yPos = GET_Y_LPARAM(event->globalPos().y());
        POINT pt = { xPos, yPos };
        ScreenToClient(hWnd, &pt);
        SendMessage(hWnd, WM_NCLBUTTONDOWN, HTBOTTOMRIGHT, MAKELPARAM(pt.x, pt.y));
    }
}

void mouseReleaseEvent(QMouseEvent *event)
{
    if (event->button() == Qt::LeftButton)
    {
        HWND hWnd = HWND(winId());
        if (hWnd && (GetCapture() == hWnd))
        {
            ReleaseCapture();
        }
    }
}