第11章 对话框_11.1 模态对话框

/*------------------------------------------
ABOUT1.C -- About Box Demo Program No. 1
(c) Charles Petzold, 1998
------------------------------------------*/
#include <windows.h>
#include "resource.h"
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
BOOL    CALLBACK AboutDlgProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
                   PSTR szCmdLine, int iCmdShow)
{
    static TCHAR szAppName[] = TEXT("About1");
    MSG          msg;
    HWND         hwnd;
    WNDCLASS     wndclass;

    wndclass.style = CS_HREDRAW | CS_VREDRAW;
    wndclass.lpfnWndProc = WndProc;
    wndclass.cbClsExtra = 0;
    wndclass.cbWndExtra = 0;
    wndclass.hInstance = hInstance;
    wndclass.hIcon = LoadIcon(hInstance, szAppName);
    wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
    wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    wndclass.lpszMenuName = szAppName;
    wndclass.lpszClassName = szAppName;

    if (!RegisterClass(&wndclass))
    {
        MessageBox(NULL, TEXT("This program requires Windows NT!"),
                   szAppName, MB_ICONERROR);
        return 0;
    }

    hwnd = CreateWindow(szAppName, TEXT("About Box Demo Program"),
                        WS_OVERLAPPEDWINDOW,
                        CW_USEDEFAULT, CW_USEDEFAULT,
                        CW_USEDEFAULT, CW_USEDEFAULT,
                        NULL, NULL, hInstance, NULL);

    ShowWindow(hwnd, iCmdShow);
    UpdateWindow(hwnd);

    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    static HINSTANCE hInstance;

    switch (message)
    {
    case WM_CREATE:
        hInstance = ((LPCREATESTRUCT)lParam)->hInstance;
        return 0;

    case WM_COMMAND:
        switch (LOWORD(wParam))
        {
        case IDM_APP_ABOUT:
            DialogBox(hInstance, TEXT("AboutBox"), hwnd, AboutDlgProc);
            break;
        }
        return 0;

    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }
    return DefWindowProc(hwnd, message, wParam, lParam);
}
BOOL CALLBACK AboutDlgProc(HWND hDlg, UINT message,
                           WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
    case WM_INITDIALOG:
        return TRUE;

    case WM_COMMAND:
        switch (LOWORD(wParam))
        {
        case IDOK:
        case IDCANCEL:
            EndDialog(hDlg, 0);
            return TRUE;
        }
        break;
    }
    return FALSE;
}

//resource.h

//{{NO_DEPENDENCIES}}
// Microsoft Developer Studio generated include file.
// Used by About1.rc
//
#define IDM_APP_ABOUT                   40001
// Next default values for new objects
// 
#ifdef APSTUDIO_INVOKED
#ifndef APSTUDIO_READONLY_SYMBOLS
#define _APS_NEXT_RESOURCE_VALUE        104
#define _APS_NEXT_COMMAND_VALUE         40004
#define _APS_NEXT_CONTROL_VALUE         1003
#define _APS_NEXT_SYMED_VALUE           101
#endif
#endif

//Microsoft Developer Studio generated resource script.
//
#include "resource.h"
#define APSTUDIO_READONLY_SYMBOLS
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 2 resource.
//
#include "afxres.h"
/////////////////////////////////////////////////////////////////////////////
#undef APSTUDIO_READONLY_SYMBOLS
/////////////////////////////////////////////////////////////////////////////
// English (U.S.) resources
#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
#ifdef _WIN32
LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
#pragma code_page(1252)
#endif //_WIN32
#ifdef APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// TEXTINCLUDE
//
1 TEXTINCLUDE DISCARDABLE
BEGIN
"resource.h\0"
END
2 TEXTINCLUDE DISCARDABLE
BEGIN
"#include ""afxres.h""\r\n"
"\0"
END
3 TEXTINCLUDE DISCARDABLE
BEGIN
"\r\n"
"\0"
END
#endif    // APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// Dialog
//
ABOUTBOX DIALOG DISCARDABLE  32, 32, 180, 102
STYLE DS_MODALFRAME | WS_POPUP
FONT 8, "MS Sans Serif"
BEGIN
DEFPUSHBUTTON   "OK", IDOK, 66, 81, 50, 14
ICON            "ABOUT1", IDC_STATIC, 7, 7, 21, 20
CTEXT           "About1", IDC_STATIC, 40, 12, 100, 8
CTEXT           "About Box Demo Program", IDC_STATIC, 7, 40, 166, 8
CTEXT           "(c) Charles Petzold, 1998", IDC_STATIC, 7, 52, 166, 8
END
/////////////////////////////////////////////////////////////////////////////
//
// Menu
//
ABOUT1 MENU DISCARDABLE
BEGIN
POPUP "&Help"
BEGIN
MENUITEM "&About About1...", IDM_APP_ABOUT
END
END
/////////////////////////////////////////////////////////////////////////////
//
// Icon
//
// Icon with lowest ID value placed first to ensure application icon
// remains consistent on all systems.
ABOUT1                  ICON    DISCARDABLE     "About1.ico"
/////////////////////////////////////////////////////////////////////////////
//
// DESIGNINFO
//
#ifdef APSTUDIO_INVOKED
GUIDELINES DESIGNINFO DISCARDABLE
BEGIN
"ABOUTBOX", DIALOG
BEGIN
LEFTMARGIN, 7
RIGHTMARGIN, 173
TOPMARGIN, 7
BOTTOMMARGIN, 95
END
END
#endif    // APSTUDIO_INVOKED
#endif    // English (U.S.) resources
/////////////////////////////////////////////////////////////////////////////
#ifndef APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 3 resource.
//
/////////////////////////////////////////////////////////////////////////////
#endif    // not APSTUDIO_INVOKED

/*------------------------------------------------------------
About2.C -- About Box Demo Program No.2
(c) Charles Petzold, 1998
------------------------------------------------------------*/
#include <windows.h>
#include "resource.h"
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
BOOL    CALLBACK AboutDlgProc(HWND, UINT, WPARAM, LPARAM);
TCHAR szAppName[] = TEXT("About2");
int iCurrentColor = IDC_BLACK,
iCurrentFigure = IDC_RECT;
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
                   PSTR szCmdLine, int iCmdShow)
{
    HWND         hwnd;
    MSG          msg;
    WNDCLASSEX     wndclass;
    wndclass.style = CS_HREDRAW | CS_VREDRAW;
    wndclass.cbSize = sizeof(WNDCLASSEX);
    wndclass.lpfnWndProc = WndProc;
    wndclass.cbClsExtra = 0;
    wndclass.cbWndExtra = 0;
    wndclass.hInstance = hInstance;
    wndclass.hIcon = LoadIcon(hInstance, szAppName);
    wndclass.hIconSm = LoadIcon(hInstance, szAppName);
    wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
    wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    wndclass.lpszMenuName = szAppName;
    wndclass.lpszClassName = szAppName;
    if (!RegisterClassEx(&wndclass))
    {
        MessageBox(NULL, TEXT("This program requires Windows NT!"),
                   szAppName, MB_ICONERROR);
        return 0;
    }

    hwnd = CreateWindow(szAppName,                  // window class name
                        TEXT("About Box Demo Program"), // window caption
                        WS_OVERLAPPEDWINDOW,        // window style
                        CW_USEDEFAULT,              // initial x position
                        CW_USEDEFAULT,              // initial y position
                        CW_USEDEFAULT,              // initial x size
                        CW_USEDEFAULT,              // initial y size
                        NULL,                       // parent window handle
                        NULL,                       // window menu handle
                        hInstance,                  // program instance handle
                        NULL);                     // creation parameters

    ShowWindow(hwnd, iCmdShow);
    UpdateWindow(hwnd);

    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return msg.wParam;
}
void PaintWindow(HWND hwnd, int iColor, int iFigure)
{
    static COLORREF crColor[8] = {
        RGB(0, 0, 0),        //Black
        RGB(0, 0, 255),      //Blue
        RGB(0, 255, 0),      //Green
        RGB(0, 255, 255),    //Cyan
        RGB(255, 0, 0),      //Red
        RGB(255, 0, 255),    //Meganta
        RGB(255, 255, 0),    //Yellow
        RGB(255, 255, 255)   //White
    };
    HDC hdc;
    HBRUSH hBrush;
    RECT rect;

    hBrush = CreateSolidBrush(crColor[iColor - IDC_BLACK]);
    hdc = GetDC(hwnd);
    GetClientRect(hwnd, &rect);
    hBrush = SelectObject(hdc, hBrush);
    if (iFigure == IDC_RECT)  //矩形按钮ID
        Rectangle(hdc, rect.left, rect.top, rect.right, rect.bottom);
    else
        Ellipse(hdc, rect.left, rect.top, rect.right, rect.bottom);
    DeleteObject(SelectObject(hdc, hBrush));
    ReleaseDC(hwnd, hdc);
}
void PaintTheBlock(HWND hCtrl, int iColor, int iFigure)
{
    InvalidateRect(hCtrl, NULL, TRUE);
    //UpdateWindow很重要，要立即生效，原因如下：
    /*
    1、因为经过InvalidateRect后，会向子窗口（IDC_PAINT）发送WM_PAINT到子窗口
    内置的窗口过程
    2、而此时如果不立即UpdateWindow，让子窗口先画出背景，而是直接去执行后
    面那条PaintWindow语句，虽然图形画出了，但会被随后来的WM_PAINT消息重绘掉
    即被背景色覆盖了。会让人误认为PaintWindow没执行的错误。
    */
    UpdateWindow(hCtrl);
    PaintWindow(hCtrl, iColor, iFigure);
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    HDC         hdc;
    PAINTSTRUCT ps;
    static HINSTANCE   hInst;
    switch (message)
    {
    case WM_CREATE:
        hInst = ((LPCREATESTRUCT)lParam)->hInstance;
        return 0;
    case WM_COMMAND:
        switch (LOWORD(wParam)) //子控件ID
        {
        case IDM_APP_ABOUT:
            if (DialogBox(hInst, szAppName, hwnd, AboutDlgProc))
                InvalidateRect(hwnd, NULL, TRUE);
            return 0;
        }
        break;
    case WM_PAINT:
        hdc = BeginPaint(hwnd, &ps);
        EndPaint(hwnd, &ps);
        PaintWindow(hwnd, iCurrentColor, iCurrentFigure);
        return 0;

    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }
    return DefWindowProc(hwnd, message, wParam, lParam);
}
BOOL CALLBACK AboutDlgProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
    static int iColor, iFigure;
    static HWND hCtrlBlock;
    switch (message)
    {
    case WM_INITDIALOG:
        iColor = iCurrentColor;
        iFigure = iCurrentFigure;
        CheckRadioButton(hDlg, IDC_BLACK, IDC_WHITE, iColor);
        CheckRadioButton(hDlg, IDC_RECT, IDC_ELLIPSE, iFigure);
        hCtrlBlock = GetDlgItem(hDlg, IDC_PAINT);
        SetFocus(GetDlgItem(hDlg, iColor));
        return FALSE;
    case WM_COMMAND:
        switch (LOWORD(wParam))
        {
        case IDOK:
            iCurrentColor = iColor;
            iCurrentFigure = iFigure;
            EndDialog(hDlg, TRUE); //将TRUE作为DialogBox的返回值，用来决定是否重绘主窗口
            return TRUE;
        case IDCANCEL:
            EndDialog(hDlg, FALSE); //将FALSE作为DialogBox的返回值
        case IDC_BLACK:
        case IDC_RED:
        case IDC_GREEN:
        case IDC_YELLOW:
        case IDC_BLUE:
        case IDC_MAGENTA:
        case IDC_CYAN:
        case IDC_WHITE:
            iColor = LOWORD(wParam);
            CheckRadioButton(hDlg, IDC_BLACK, IDC_WHITE, iColor);
            PaintTheBlock(hCtrlBlock, iColor, iFigure);
            return TRUE;
        case IDC_RECT:
        case IDC_ELLIPSE:
            iFigure = LOWORD(wParam);
            CheckRadioButton(hDlg, IDC_RECT, IDC_ELLIPSE, iFigure);
            PaintTheBlock(hCtrlBlock, iColor, iFigure);
            return TRUE;
        }
        break;
    case WM_PAINT:
        PaintTheBlock(hCtrlBlock, iColor, iFigure);
        break; //不能直接return TRUE; 要交默认处理，因为无效区要通过BeginPaint有效化。
    }
    return FALSE;
}

//{{NO_DEPENDENCIES}}
// Microsoft Visual C++ 生成的包含文件。
// 供 About2.rc 使用
//
#define IDC_BLACK                       1001
#define IDC_BLUE                        1002
#define IDC_GREEN                       1003
#define IDC_CYAN                        1004
#define IDC_RED                         1005
#define IDC_MAGENTA                     1006
#define IDC_YELLOW                      1007
#define IDC_WHITE                       1008
#define IDC_RECT                        1009
#define IDC_ELLIPSE                     1010
#define IDC_PAINT                       1011
#define IDM_APP_ABOUT                   40001
// Next default values for new objects
// 
#ifdef APSTUDIO_INVOKED
#ifndef APSTUDIO_READONLY_SYMBOLS
#define _APS_NEXT_RESOURCE_VALUE        104
#define _APS_NEXT_COMMAND_VALUE         40004
#define _APS_NEXT_CONTROL_VALUE         1012
#define _APS_NEXT_SYMED_VALUE           101
#endif
#endif

// Microsoft Visual C++ generated resource script.
//
#include "resource.h"
#define APSTUDIO_READONLY_SYMBOLS
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 2 resource.
//
#include "winres.h"
/////////////////////////////////////////////////////////////////////////////
#undef APSTUDIO_READONLY_SYMBOLS
/////////////////////////////////////////////////////////////////////////////
// 中文(简体，中国) resources
#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_CHS)
LANGUAGE LANG_CHINESE, SUBLANG_CHINESE_SIMPLIFIED
#ifdef APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// TEXTINCLUDE
//
1 TEXTINCLUDE
BEGIN
"resource.h\0"
END
2 TEXTINCLUDE
BEGIN
"#include ""winres.h""\r\n"
"\0"
END
3 TEXTINCLUDE
BEGIN
"\r\n"
"\0"
END
#endif    // APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// Icon
//
// Icon with lowest ID value placed first to ensure application icon
// remains consistent on all systems.
ABOUT2                  ICON                    "About2.ico"
/////////////////////////////////////////////////////////////////////////////
//
// Dialog
//
ABOUT2 DIALOGEX 32, 32, 200, 234
STYLE DS_SETFONT | DS_MODALFRAME | DS_FIXEDSYS | WS_POPUP | WS_CAPTION
FONT 8, "MS Shell Dlg", 400, 0, 0x1
BEGIN
DEFPUSHBUTTON   "&Ok", IDOK, 36, 205, 50, 14
PUSHBUTTON      "Cancel", IDCANCEL, 99, 204, 50, 14
ICON            "ABOUT2", IDC_STATIC, 7, 7, 21, 20
LTEXT           "About2", IDC_STATIC, 95, 14, 24, 8
LTEXT           "About Box Demo Program", IDC_STATIC, 69, 31, 83, 8
LTEXT           "", IDC_PAINT, 102, 55, 77, 79
GROUPBOX        "&Color", IDC_STATIC, 17, 49, 73, 141
CONTROL         "&Black", IDC_BLACK, "Button", BS_AUTORADIOBUTTON | WS_GROUP | WS_TABSTOP, 25, 61, 32, 10
CONTROL         "B&lue", IDC_BLUE, "Button", BS_AUTORADIOBUTTON, 25, 77, 29, 10
CONTROL         "&Green", IDC_GREEN, "Button", BS_AUTORADIOBUTTON, 25, 93, 35, 10
CONTROL         "Cya&n", IDC_CYAN, "Button", BS_AUTORADIOBUTTON, 25, 109, 33, 10
CONTROL         "&Red", IDC_RED, "Button", BS_AUTORADIOBUTTON, 25, 125, 29, 10
CONTROL         "&Megenta", IDC_MAGENTA, "Button", BS_AUTORADIOBUTTON, 25, 141, 44, 10
CONTROL         "&Yellow", IDC_YELLOW, "Button", BS_AUTORADIOBUTTON, 25, 157, 36, 10
CONTROL         "&White", IDC_WHITE, "Button", BS_AUTORADIOBUTTON, 26, 173, 35, 10
GROUPBOX        "&Figure", IDC_STATIC, 100, 146, 82, 43
CONTROL         "Rec&tangle", IDC_RECT, "Button", BS_AUTORADIOBUTTON | WS_GROUP | WS_TABSTOP, 112, 158, 48, 10
CONTROL         "&Ellipse", IDC_ELLIPSE, "Button", BS_AUTORADIOBUTTON, 112, 175, 35, 10
END
/////////////////////////////////////////////////////////////////////////////
//
// DESIGNINFO
//
#ifdef APSTUDIO_INVOKED
GUIDELINES DESIGNINFO
BEGIN
"ABOUT2", DIALOG
BEGIN
LEFTMARGIN, 7
RIGHTMARGIN, 192
TOPMARGIN, 7
BOTTOMMARGIN, 228
END
END
#endif    // APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// Menu
//
ABOUT2 MENU
BEGIN
POPUP "&Help"
BEGIN
MENUITEM "&About", IDM_APP_ABOUT
END
END
#endif    // 中文(简体，中国) resources
/////////////////////////////////////////////////////////////////////////////
#ifndef APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 3 resource.
//
/////////////////////////////////////////////////////////////////////////////
#endif    // not APSTUDIO_INVOKED

/*------------------------------------------------------------
About3.C -- About Box Demo Program No.3
(c) Charles Petzold, 1998
------------------------------------------------------------*/
#include <windows.h>
#include "resource.h"
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK EllipsePushWndProc(HWND, UINT, WPARAM, LPARAM);
BOOL    CALLBACK AboutDlgProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
                   PSTR szCmdLine, int iCmdShow)
{
    static TCHAR szAppName[] = TEXT("About3");
    HWND         hwnd;
    MSG          msg;
    WNDCLASSEX     wndclass;
    wndclass.style = CS_HREDRAW | CS_VREDRAW;
    wndclass.cbSize = sizeof(WNDCLASSEX);
    wndclass.lpfnWndProc = EllipsePushWndProc;
    wndclass.cbClsExtra = 0;
    wndclass.cbWndExtra = 0;
    wndclass.hInstance = hInstance;
    wndclass.hIcon = NULL;
    wndclass.hIconSm = NULL;
    wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
    wndclass.hbrBackground = (HBRUSH)(COLOR_BTNFACE + 1);
    wndclass.lpszMenuName = NULL;
    wndclass.lpszClassName = TEXT("EllipsePush");
    if (!RegisterClassEx(&wndclass))
    {
        MessageBox(NULL, TEXT("This program requires Windows NT!"),
                   szAppName, MB_ICONERROR);
        return 0;
    }

    wndclass.style = CS_HREDRAW | CS_VREDRAW;
    wndclass.cbSize = sizeof(WNDCLASSEX);
    wndclass.lpfnWndProc = WndProc;
    wndclass.cbClsExtra = 0;
    wndclass.cbWndExtra = 0;
    wndclass.hInstance = hInstance;
    wndclass.hIcon = LoadIcon(hInstance, szAppName);
    wndclass.hIconSm = LoadIcon(hInstance, szAppName);
    wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
    wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    wndclass.lpszMenuName = szAppName;
    wndclass.lpszClassName = szAppName;
    RegisterClassEx(&wndclass);
    hwnd = CreateWindow(szAppName,                  // window class name
                        TEXT("About Box Demo Program"), // window caption
                        WS_OVERLAPPEDWINDOW,        // window style
                        CW_USEDEFAULT,              // initial x position
                        CW_USEDEFAULT,              // initial y position
                        CW_USEDEFAULT,              // initial x size
                        CW_USEDEFAULT,              // initial y size
                        NULL,                       // parent window handle
                        NULL,                       // window menu handle
                        hInstance,                  // program instance handle
                        NULL);                     // creation parameters

    ShowWindow(hwnd, iCmdShow);
    UpdateWindow(hwnd);

    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    HDC         hdc;
    PAINTSTRUCT ps;
    static HINSTANCE hInst;

    switch (message)
    {
    case WM_CREATE:
        hInst = ((LPCREATESTRUCT)lParam)->hInstance;
        return 0;
    case WM_COMMAND:
        switch (LOWORD(wParam))
        {
        case IDM_APP_ABOUT:
            DialogBox(hInst, TEXT("About3"), hwnd, AboutDlgProc);
            return 0;
        }
        break;
    case WM_PAINT:
        hdc = BeginPaint(hwnd, &ps);

        EndPaint(hwnd, &ps);
        return 0;

    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }
    return DefWindowProc(hwnd, message, wParam, lParam);
}
BOOL    CALLBACK AboutDlgProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
    case WM_INITDIALOG:
        return TRUE;
    case WM_COMMAND:
        switch (LOWORD(wParam))
        {
        case IDOK:
            EndDialog(hDlg, 0);
            return TRUE;
        }
        break;
    }
    return  FALSE;
}
//子窗口（按钮）过程
LRESULT CALLBACK EllipsePushWndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    TCHAR  szText[40];
    HBRUSH hBrush;
    HDC hdc;
    PAINTSTRUCT ps;
    RECT rc;
    switch (message)
    {
    case WM_PAINT:
        GetClientRect(hwnd, &rc);
        GetWindowText(hwnd, szText, sizeof(szText));
        hdc = BeginPaint(hwnd, &ps);
        hBrush = CreateSolidBrush(GetSysColor(COLOR_WINDOW));
        hBrush = SelectObject(hdc, (HGDIOBJ)hBrush);
        SetBkColor(hdc, GetSysColor(COLOR_WINDOW));
        SetTextColor(hdc, GetSysColor(COLOR_WINDOWTEXT));
        Ellipse(hdc, rc.left, rc.top, rc.right, rc.bottom);
        DrawText(hdc, szText, -1, &rc,
                 DT_SINGLELINE | DT_CENTER | DT_VCENTER);
        DeleteObject(hBrush);
        EndPaint(hwnd, &ps);
        return 0;
    case WM_KEYUP:
        if (wParam != VK_SPACE)
            break;
        //继续执行下去,处理空格键
    case WM_LBUTTONUP:
        SendMessage(GetParent(hwnd), WM_COMMAND, GetWindowLong(hwnd, GWL_ID), (LPARAM)hwnd);
        return 0;
    }
    return DefWindowProc(hwnd, message, wParam, lParam);
}

//{{NO_DEPENDENCIES}}
// Microsoft Visual C++ 生成的包含文件。
// 供 About3.rc 使用
//
#define IDM_APP_ABOUT                   40002
// Next default values for new objects
// 
#ifdef APSTUDIO_INVOKED
#ifndef APSTUDIO_READONLY_SYMBOLS
#define _APS_NEXT_RESOURCE_VALUE        104
#define _APS_NEXT_COMMAND_VALUE         40003
#define _APS_NEXT_CONTROL_VALUE         1002
#define _APS_NEXT_SYMED_VALUE           101
#endif
#endif

// Microsoft Visual C++ generated resource script.
//
#include "resource.h"
#define APSTUDIO_READONLY_SYMBOLS
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 2 resource.
//
#include "winres.h"
/////////////////////////////////////////////////////////////////////////////
#undef APSTUDIO_READONLY_SYMBOLS
/////////////////////////////////////////////////////////////////////////////
// 中文(简体，中国) resources
#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_CHS)
LANGUAGE LANG_CHINESE, SUBLANG_CHINESE_SIMPLIFIED
#ifdef APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// TEXTINCLUDE
//
1 TEXTINCLUDE
BEGIN
"resource.h\0"
END
2 TEXTINCLUDE
BEGIN
"#include ""winres.h""\r\n"
"\0"
END
3 TEXTINCLUDE
BEGIN
"\r\n"
"\0"
END
#endif    // APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// Menu
//
ABOUT3 MENU
BEGIN
POPUP "&Help"
BEGIN
MENUITEM "About About3...", IDM_APP_ABOUT
END
END
/////////////////////////////////////////////////////////////////////////////
//
// Dialog
//
ABOUT3 DIALOGEX 0, 0, 167, 150
STYLE DS_SETFONT | DS_MODALFRAME | DS_FIXEDSYS | WS_POPUP | WS_VISIBLE
FONT 8, "MS Shell Dlg", 400, 0, 0x1
BEGIN
ICON            "ABOUT3", IDC_STATIC, 7, 7, 20, 20
LTEXT           "About3", IDC_STATIC, 68, 33, 24, 8
LTEXT           "About Box Demo Program", IDC_STATIC, 44, 55, 83, 8
LTEXT           "(c) Charles PetZold,1998", IDC_STATIC, 44, 77, 80, 8
CONTROL         "OK", IDOK, "EllipsePush", WS_TABSTOP, 54, 113, 50, 14 //这里EllipsePush为自定义的 窗口类，很重要！
END
/////////////////////////////////////////////////////////////////////////////
//
// Icon
//
// Icon with lowest ID value placed first to ensure application icon
// remains consistent on all systems.
ABOUT3                  ICON                    "ICON1.ICO"
/////////////////////////////////////////////////////////////////////////////
//
// DESIGNINFO
//
#ifdef APSTUDIO_INVOKED
GUIDELINES DESIGNINFO
BEGIN
"ABOUT3", DIALOG
BEGIN
LEFTMARGIN, 7
RIGHTMARGIN, 157
TOPMARGIN, 7
BOTTOMMARGIN, 142
END
END
#endif    // APSTUDIO_INVOKED
#endif    // 中文(简体，中国) resources
/////////////////////////////////////////////////////////////////////////////
#ifndef APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 3 resource.
//
/////////////////////////////////////////////////////////////////////////////
#endif    // not APSTUDIO_INVOKED