win32 字体变换与窗口同大同小

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#include <windows.h>
#include "res/resource.h"


LRESULT CALLBACK WinProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
BOOL InitApp(HINSTANCE hInstance, LPCSTR szClassName);
BOOL InitInstance(HINSTANCE hInstance, LPCSTR szClassName, int nCmdShow);


int WINAPI WinMain(
     IN HINSTANCE hInstance,
     IN HINSTANCE hPrevInstance,
     IN LPSTR lpCmdLine,
     IN int nShowCmd
     )
{
    MSG msg;
    char szClassName[] = "FontFace";  //窗口名
    //注册窗口类
    if(!InitApp(hInstance, szClassName))
        return 0;
    //初始化窗口
    if( !InitInstance(hInstance, szClassName, nShowCmd) )
        return 0;


    while(GetMessage(&msg, NULL, NULL, NULL))
    {
        TranslateMessage(&msg);  //消息解释
        DispatchMessage(&msg);   //消息传送
    }
    return (int)msg.wParam;
}


LRESULT CALLBACK WinProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
    PAINTSTRUCT ps;
    HDC hdc;
    HFONT hFont, hOldFont;
    RECT rect;
    char *str = "徐国先";
    int width;
    int height;
    switch( uMsg )
    {
    case WM_PAINT:
        hdc = BeginPaint(hwnd, &ps);
        GetClientRect(hwnd, &rect);
        width = (rect.right-20)/(int)strlen(str);
        height = rect.bottom-20;
        hFont = CreateFont(
            height,      //字体的逻辑高度
            width,       //逻辑平均字符宽度
            0,           //与水平线的角度
            0,           //基线方位角度
            FW_REGULAR,  //字形：常规
            FALSE,       //字形：斜体
            FALSE,       //字形：下划线
            FALSE,       //字形：粗体
            GB2312_CHARSET,          //字符集
            OUT_DEFAULT_PRECIS,      //输出精度
            CLIP_DEFAULT_PRECIS,     //剪截精度
            PROOF_QUALITY,           //输出品质
            FIXED_PITCH | FF_MODERN, //倾斜度
            "隶书"                   //字体
            );
        hOldFont = (HFONT)SelectObject(hdc, hFont);       //选择字体
        SetTextColor(hdc, 0xC0C0C0);
        TextOut(hdc, 10, 10, str, (int)strlen(str));
        SelectObject(hdc, hOldFont);                      //选择旧字体
        DeleteObject(hFont);                              //删除新字体
        EndPaint(hwnd, &ps);
        break;


    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    default:
       return DefWindowProc(hwnd, uMsg, wParam, lParam);
    }
    return 0;
}


BOOL InitApp(HINSTANCE hInstance, LPCSTR szClassName)
{
    WNDCLASS wndClass;
    ZeroMemory(&wndClass, sizeof(wndClass));


    wndClass.style          = CS_VREDRAW|CS_HREDRAW;
    wndClass.cbClsExtra     = 0;
    wndClass.cbWndExtra     = 0;
    wndClass.hInstance      = hInstance;
    wndClass.hCursor        = LoadCursor(hInstance, IDC_ARROW);
    wndClass.hIcon          = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_TEST));
    wndClass.hbrBackground  = (HBRUSH)GetStockObject(COLOR_BTNFACE);
    wndClass.lpfnWndProc    = (WNDPROC)WinProc;
    wndClass.lpszClassName  = (LPCSTR)szClassName;
    wndClass.lpszMenuName   = NULL;
    return RegisterClass(&wndClass);
}


BOOL InitInstance(HINSTANCE hInstance, LPCSTR szClassName, int nCmdShow)
{
    HWND hwnd;
    hwnd = CreateWindow(
        szClassName,
        "Sdk 字体变换",
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT, CW_USEDEFAULT,
        400, 300,
        NULL,
        NULL,
        hInstance,
        NULL
        );
    //
    if (!hwnd) return FALSE;
    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);
    return TRUE;
}

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