自学教程：C++ GetWindowsDirectoryW函数代码示例

static HINF search_for_inf(LPCVOID InfSpec, DWORD SearchControl){    HINF hInf = INVALID_HANDLE_VALUE;    WCHAR inf_path[MAX_PATH];    static const WCHAR infW[] = {'//','i','n','f','//',0};    static const WCHAR system32W[] = {'//','s','y','s','t','e','m','3','2','//',0};    if (SearchControl == INFINFO_REVERSE_DEFAULT_SEARCH)    {        GetWindowsDirectoryW(inf_path, MAX_PATH);        lstrcatW(inf_path, system32W);        lstrcatW(inf_path, InfSpec);        hInf = SetupOpenInfFileW(inf_path, NULL,                                 INF_STYLE_OLDNT | INF_STYLE_WIN4, NULL);        if (hInf != INVALID_HANDLE_VALUE)            return hInf;        GetWindowsDirectoryW(inf_path, MAX_PATH);        lstrcpyW(inf_path, infW);        lstrcatW(inf_path, InfSpec);        return SetupOpenInfFileW(inf_path, NULL,                                 INF_STYLE_OLDNT | INF_STYLE_WIN4, NULL);    }    return INVALID_HANDLE_VALUE;}

static void test_GetWindowsDirectoryW(void){    UINT len, len_with_null;    WCHAR buf[MAX_PATH];    static const WCHAR fooW[] = {'f','o','o',0};    len_with_null = GetWindowsDirectoryW(NULL, 0);    if (len_with_null == 0 && GetLastError() == ERROR_CALL_NOT_IMPLEMENTED)    {        win_skip("GetWindowsDirectoryW is not implemented/n");        return;    }    ok(len_with_null <= MAX_PATH, "should fit into MAX_PATH/n");    lstrcpyW(buf, fooW);    len = GetWindowsDirectoryW(buf, 1);    ok(lstrcmpW(buf, fooW) == 0, "should not touch the buffer/n");    ok(len == len_with_null, "GetWindowsDirectoryW returned %d, expected %d/n",       len, len_with_null);    lstrcpyW(buf, fooW);    len = GetWindowsDirectoryW(buf, len_with_null - 1);    ok(lstrcmpW(buf, fooW) == 0, "should not touch the buffer/n");    ok(len == len_with_null, "GetWindowsDirectoryW returned %d, expected %d/n",       len, len_with_null);    lstrcpyW(buf, fooW);    len = GetWindowsDirectoryW(buf, len_with_null);    ok(lstrcmpW(buf, fooW) != 0, "should touch the buffer/n");    ok(len == lstrlenW(buf), "returned length should be equal to the length of string/n");    ok(len == len_with_null-1, "GetWindowsDirectoryW returned %d, expected %d/n",       len, len_with_null-1);}

char *win32_get_font_dir(const char *font_file){    wchar_t wdir[MAX_PATH];    if (S_OK != SHGetFolderPathW(NULL, CSIDL_FONTS, NULL, SHGFP_TYPE_CURRENT, wdir)) {        int lenght = GetWindowsDirectoryW(wdir, MAX_PATH);        if (lenght == 0 || lenght > (MAX_PATH - 8)) {            BD_DEBUG(DBG_FILE, "Font directory path too long!/n");            return NULL;        }        if (!wcscat(wdir, L"//fonts")) {            BD_DEBUG(DBG_FILE, "Could not construct font directory path!/n");            return NULL;        }    }    int   len  = WideCharToMultiByte (CP_UTF8, 0, wdir, -1, NULL, 0, NULL, NULL);    char *path = malloc(len + strlen(font_file) + 2);    if (path) {        WideCharToMultiByte(CP_UTF8, 0, wdir, -1, path, len, NULL, NULL);        path[len - 1] = '//';        strcpy(path + len, font_file);    }    return path;}

BOOL bCheckIfDualBootingWithWin31(){    WCHAR Buffer[32];    WCHAR awcWindowsDir[MAX_PATH];    DWORD dwRet;    UINT  cwchWinPath = GetWindowsDirectoryW(awcWindowsDir, MAX_PATH);// the cwchWinPath value does not include the terminating zero    if (awcWindowsDir[cwchWinPath - 1] == L'//')    {        cwchWinPath -= 1;    }    awcWindowsDir[cwchWinPath] = L'/0'; // make sure to zero terminated    lstrcatW(awcWindowsDir, L"//system32//");    lstrcatW(awcWindowsDir, WINNT_GUI_FILE_W);    dwRet = GetPrivateProfileStringW(                WINNT_DATA_W,                WINNT_D_WIN31UPGRADE_W,                WINNT_A_NO_W,                Buffer,                sizeof(Buffer)/sizeof(WCHAR),                awcWindowsDir                );    #if DBG    DbgPrint("/n dwRet = %ld, win31upgrade = %ws/n/n", dwRet, Buffer);    #endif    return (BOOL)(dwRet ? (!lstrcmpiW(Buffer,WINNT_A_YES)) : 0);}

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C++ GetWindowsVersion函数代码示例
C++ GetWindowsDirectory函数代码示例