如何在调整大小时更新WC_EDIT控制边距

该程序在主窗口中创建WC_EDIT控件。每当调整窗口本身的大小时，主窗口都会调整编辑控件的大小。我正在尝试通过在调整大小时更新控件的格式矩形来设置编辑控件内容的边距WC_EDIT。

主窗口响应WM_SIZE消息并调整编辑控件的大小，然后编辑控件响应其自己的WM_SIZE消息并尝试使用 EM_SETRECT 更新格式矩形，但没有任何反应。

#include <windows.h>
#include <commctrl.h>
LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
LRESULT CALLBACK EditWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
HWND hwnd;
HWND editHwnd;
WNDPROC origEditProc;
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE, LPSTR pCmdLine, int nCmdShow)
{
    WNDCLASS wc = {};
    wc.lpfnWndProc = WindowProc;
    wc.hInstance = hInstance;
    wc.lpszClassName = "Window Class";
    RegisterClass(&wc);
    hwnd = CreateWindow(
        wc.lpszClassName, 
        "",
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT, 
        CW_USEDEFAULT, 
        CW_USEDEFAULT, 
        CW_USEDEFAULT,
        NULL,
        NULL,
        hInstance,
        NULL
    );
    editHwnd = CreateWindow(
        WC_EDIT,
        "Lorem ipsum",
        WS_CHILD | WS_VISIBLE | WS_VSCROLL | ES_LEFT | ES_MULTILINE | ES_AUTOVSCROLL,
        0,
        0,
        100,
        100,
        hwnd,
        NULL,
        hInstance,
        NULL
    );
    origEditProc = (WNDPROC) GetWindowLongPtr(editHwnd, GWLP_WNDPROC);
    SetWindowLongPtr(editHwnd, GWLP_WNDPROC, (LONG_PTR)EditWindowProc);
    ShowWindow(hwnd, nCmdShow);
    MSG msg = {};
    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return 0;
}
LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch (uMsg)
    {
        case WM_DESTROY:
            PostQuitMessage(0);
            return 0;
        return 0;
        case WM_SIZE:
            RECT clientRect;
            GetClientRect(hwnd, &clientRect);
            SetWindowPos(editHwnd, NULL, 0, 0, clientRect.right - clientRect.left, clientRect.bottom - clientRect.top,
                SWP_NOMOVE | SWP_NOZORDER | SWP_NOOWNERZORDER | SWP_NOACTIVATE);
    }
    return DefWindowProc(hwnd, uMsg, wParam, lParam);
}
LRESULT CALLBACK EditWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch (uMsg)
    {
        case WM_SIZE:
            RECT rect;
            GetClientRect(editHwnd, &rect);
            rect.left += 50;
            rect.top += 50;
            rect.right -= 50;
            rect.bottom -= 50;
            SendMessage(editHwnd, EM_SETRECT, NULL, (LPARAM)&rect);
    }
    return CallWindowProc(origEditProc, hwnd, uMsg, wParam, lParam);
}