WS_TABSTOP没法切换焦点

WS_TABSTOP无法切换焦点?
小弟我最近一个程序临时需要用到windows api去创建界面，不是MFC噢，但我对windows编程不熟悉。我在用createwindow创建主窗体后WindowProc函数中会响应WM_CREATE，然后在这里面用

C/C++ code

CreateWindow(        L"EDIT",        NULL,        WS_CHILD | WS_VISIBLE| WS_BORDER | WS_TABSTOP | WS_GROUP/*| ES_PASSWORD*/ ,        CW_USEDEFAULT,        CW_USEDEFAULT,        CW_USEDEFAULT,        CW_USEDEFAULT,        hwndP,        menu,        hinst,        0);

C/C++ code

Newgui::Newgui(HINSTANCE hInstance, int nCmdShow,int argc, char **argv){    newgui_argc = argc;    newgui_argv = argv;    WNDCLASSEX WindowClass;    static LPCTSTR szAppname = L"window";    MSG msg;    WindowClass.cbSize = sizeof(WNDCLASSEX);    WindowClass.style = CS_HREDRAW | CS_VREDRAW | WS_TABSTOP;    WindowClass.lpfnWndProc = WindowProc;    WindowClass.cbClsExtra = 0;    WindowClass.cbWndExtra = 0;    WindowClass.hInstance = hInstance;    WindowClass.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(RED_ICON_RES_ID));    WindowClass.hCursor = LoadCursor(0, IDC_ARROW);    WindowClass.hbrBackground = (HBRUSH)(COLOR_BTNFACE + 1) ;    WindowClass.lpszMenuName = 0;    WindowClass.lpszClassName = szAppname;    WindowClass.hIconSm = 0;    RegisterClassEx(&WindowClass);    hWnd = CreateWindow(        szAppname,        L"Client",        WS_OVERLAPPEDWINDOW,        CW_USEDEFAULT,        CW_USEDEFAULT,        350,  //宽        240,   //高        0,        0,        hInstance,        0);            ShowWindow(hWnd, SW_SHOWNORMAL);    UpdateWindow(hWnd);    while(GetMessage(&msg, 0, 0, 0) == TRUE)    {        TranslateMessage(&msg);        DispatchMessage(&msg);    }}LRESULT WINAPI Newgui::WindowProc(HWND hWnd, UINT message,WPARAM wParam ,LPARAM lParam){    HDC hDC;    PAINTSTRUCT PaintSt;    RECT aRect;    HINSTANCE hInstance = NULL;    HWND hostEdit = NULL, hostLabel = NULL,pwdEdit = NULL,                  pwdLabel = NULL, portLabel = NULL, portEdit = NULL;    HWND connectBtn = NULL , helpBtn = NULL;    TCHAR HostInput[MAX_CHAR1];    TCHAR PwdInput[MAX_CHAR2];    TCHAR PortInput[PORTSZ];    int i = 0, j = 0, k = 0;        SendDlgItemMessage(hWnd, IDC_HOST, EM_SETLIMITTEXT,(WPARAM)15, (LPARAM)0);    SendDlgItemMessage(hWnd, IDC_PWD, EM_SETLIMITTEXT, (WPARAM)18, (LPARAM)0);    switch(message)    {        case WM_CREATE:                    hostEdit = CreateEdit(hWnd, hInstance, (HMENU)IDC_HOST);            SetWindowPos(hostEdit, HWND_TOP, 120, 40, 180, 20, SWP_SHOWWINDOW);                pwdEdit = CreatePwdEdit(hWnd , hInstance, (HMENU)IDC_PWD);            SetWindowPos(pwdEdit, HWND_TOP, 120, 70, 180, 20, SWP_SHOWWINDOW);            hostLabel = CreateLabel(hWnd, hInstance, L"主机:");            SendMessage(hostLabel, WM_SETFONT, (WPARAM)hf, TRUE);             SetWindowPos(hostLabel, HWND_TOP, 20, 40, 80, 20, SWP_SHOWWINDOW);            pwdLabel = CreateLabel(hWnd, hInstance, L"密码:");            SendMessage(pwdLabel, WM_SETFONT, (WPARAM)hf, TRUE);             SetWindowPos(pwdLabel, HWND_TOP, 20, 70, 80, 20, SWP_SHOWWINDOW);            portLabel = CreateLabel(hWnd, hInstance, L"端口:");            SendMessage(portLabel, WM_SETFONT, (WPARAM)hf, TRUE);             SetWindowPos(portLabel, HWND_TOP, 20, 100, 80, 20, SWP_SHOWWINDOW);            portEdit = CreateEdit(hWnd, hInstance, (HMENU)IDC_PORT);            SetWindowPos(portEdit, HWND_TOP, 120, 100, 180, 20, SWP_SHOWWINDOW);            connectBtn = CreateButton(hWnd, hInstance, L"连接", (HMENU)IDB_CONNECT);            SendMessage(connectBtn, WM_SETFONT, (WPARAM)hf, TRUE);             SetWindowPos(connectBtn, HWND_TOP, 250, 150, 50, 20, SWP_SHOWWINDOW);            helpBtn = CreateButton(hWnd, hInstance, L"帮助",(HMENU)IDB_HELP);            SendMessage(helpBtn, WM_SETFONT, (WPARAM)hf, TRUE);             SetWindowPos(helpBtn, HWND_TOP, 180, 150, 50, 20, SWP_SHOWWINDOW);                 case WM_ACTIVATE:                // 当窗口被激活时，将焦点设置在文本框上                 ::SetFocus(hostEdit);        //这个会起作用                     case WM_DESTROY:            PostQuitMessage(0);         return 0;            default:            return DefWindowProc(hWnd, message, wParam, lParam);    } 
 

C/C++ code

HWND hEdit = NULL;    while (GetMessage(&msg, NULL, 0, 0))     {        hEdit = msg.hwnd;        if((NULL != hEdit) && (WM_KEYDOWN == msg.message) && (VK_TAB == msg.wParam))        {            TCHAR szClass[MAX_PATH] = {0};            GetClassName(hEdit, szClass, sizeof(szClass)/sizeof(szClass[0]));            if(0 == _tcscmp(szClass, _T("Edit")))            {                HWND hWnd = GetNextDlgTabItem(GetParent(hEdit), hEdit, FALSE);                SetFocus(hWnd);            }        }        if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))         {            TranslateMessage(&msg);            DispatchMessage(&msg);        }    }