[奖励:结贴单独给分!!!]请教~想实现这样的效果:"win32创建的两个窗口,每次只关闭一个"

Question

#define WIN32_LEAN_AND_MEAN#include <windows.h>
#include <windowsx.h>
#include <stdio.h>     
#include <math.h>#define WINDOW_CLASS_NAME "WINCLASS1"LRESULT CALLBACK WindowProc(HWND hwnd, 
UINT msg, 
WPARAM wparam, 
LPARAM lparam)
{
PAINTSTRUCT ps;
HDC hdc; switch(msg)
{
case WM_CREATE: 
{
return(0);
} break; case WM_PAINT: 
{
hdc = BeginPaint(hwnd,&ps);  
EndPaint(hwnd,&ps);
return(0);
} break; case WM_DESTROY: 
{
PostQuitMessage(0);
return(0);
} break; default:break; } // end switch return (DefWindowProc(hwnd, msg, wparam, lparam));} // end WinProc
int WINAPI WinMain( HINSTANCE hinstance,
   HINSTANCE hprevinstance,
   LPSTR lpcmdline,
   int ncmdshow)
{ WNDCLASSEX winclass;
HWND    hwnd;
MSG    msg; winclass.cbSize         = sizeof(WNDCLASSEX);
winclass.style = CS_DBLCLKS | CS_OWNDC | 
CS_HREDRAW | CS_VREDRAW;
winclass.lpfnWndProc = WindowProc;
winclass.cbClsExtra = 0;
winclass.cbWndExtra = 0;
winclass.hInstance = hinstance;
winclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
winclass.hCursor = LoadCursor(NULL, IDC_ARROW);
winclass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
winclass.lpszMenuName = NULL;
winclass.lpszClassName = WINDOW_CLASS_NAME;
winclass.hIconSm        = LoadIcon(NULL, IDI_APPLICATION); if (!RegisterClassEx(&winclass))
return(0); // create the first window
if (!(hwnd = CreateWindowEx(NULL,
WINDOW_CLASS_NAME,
"Window 1 Based on WINCLASS1",
WS_OVERLAPPEDWINDOW | WS_VISIBLE,
0,0,
400,400,
NULL, 
NULL,
hinstance,
NULL)))
return(0); // create the second window
if (!(hwnd = CreateWindowEx(NULL,
WINDOW_CLASS_NAME,
"Window 2 Also Based on WINCLASS1",
WS_OVERLAPPEDWINDOW | WS_VISIBLE,
100,100,
400,400,
NULL, 
NULL,
hinstance,
NULL)))
return(0); while(TRUE)
{
if (PeekMessage(&msg,NULL,0,0,PM_REMOVE))
{ 
if (msg.message == WM_QUIT)
break;
TranslateMessage(&msg);
DispatchMessage(&msg);
} // end if
} // end while
return(msg.wParam);
} // end WinMain///////////////////////////////////////////////////////////问题:
这个程序时这样子的,当你关闭了两个窗口中的任意一个,另外一个也随之关闭...
我想实现的理想效果----每次只关闭一个窗口,并且仅当两个窗口都关闭以后才发送WM_QUIT消息!奖励:结贴单独给分!!!

Answer 1

#define WIN32_LEAN_AND_MEAN#include <windows.h>
#include <windowsx.h>
#include <stdio.h> 
#include <math.h>#define WINDOW_CLASS_NAME "WINCLASS1"HWND HWndPtr_1;
HWND HWndPtr_2;LRESULT CALLBACK WindowProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
{
    PAINTSTRUCT ps; 
    HDC hdc;    switch(msg)
    { 
        case WM_CREATE: 
        {
            return(0);
        } break;        case WM_PAINT: 
        {
            hdc = BeginPaint(hwnd,&ps); 
            EndPaint(hwnd,&ps);
            return(0);
        } break;        case WM_DESTROY: 
        {
            if ( HWndPtr_1 ==  hwnd )
                HWndPtr_1 = 0;
            else
                HWndPtr_2 = 0;
            PostQuitMessage(0);
            return(0);
        } break;        default:break;    } // end switch    return (DefWindowProc(hwnd, msg, wparam, lparam));} // end WinProc
int WINAPI WinMain( HINSTANCE hinstance,HINSTANCE hprevinstance,LPSTR lpcmdline,int ncmdshow)
{    WNDCLASSEX winclass;
    HWND hwnd;
    MSG msg;     winclass.cbSize = sizeof(WNDCLASSEX);
    winclass.style = CS_DBLCLKS | CS_OWNDC | 
    CS_HREDRAW | CS_VREDRAW;
    winclass.lpfnWndProc = WindowProc;
    winclass.cbClsExtra = 0;
    winclass.cbWndExtra = 0;
    winclass.hInstance = hinstance;
    winclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    winclass.hCursor = LoadCursor(NULL, IDC_ARROW);
    winclass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
    winclass.lpszMenuName = NULL;
    winclass.lpszClassName = WINDOW_CLASS_NAME;
    winclass.hIconSm = LoadIcon(NULL, IDI_APPLICATION);    if (!RegisterClassEx(&winclass))
        return(0);    // create the first window
    if (!(HWndPtr_1 = CreateWindowEx(NULL,WINDOW_CLASS_NAME,"Window 1 Based on WINCLASS1",
                                WS_OVERLAPPEDWINDOW | WS_VISIBLE,0,0,
                                400,400,NULL, NULL,hinstance,NULL))) 
        return(0);    // create the second window
    if (!(HWndPtr_2 = CreateWindowEx(NULL,WINDOW_CLASS_NAME,"Window 2 Also Based on WINCLASS1",
                                WS_OVERLAPPEDWINDOW | WS_VISIBLE,100,100,400,400,NULL, NULL,hinstance,NULL))) 
        return(0);    while(TRUE)
    {
        if (PeekMessage(&msg,NULL,0,0,PM_REMOVE))
        { 
            if ( HWndPtr_1 == 0 && HWndPtr_2 == 0 )
            {
                if (msg.message == WM_QUIT){
                    break;
                }
            }
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        } // end if
    } // end while
    return(msg.wParam);
} // end WinMain///////////////////////////////////////////////////////////

Answer 2

你用同一个窗口类创建两个窗口，那么窗口过程是相同的，也就是说消息处理代码是共享的。在处理WM_DESTROY消息时，就不能直接调用PostQuitMessage，先要检查hwnd1或hwnd2(hwnd1和hwnd2是CreateWindow的返回值，保存为全局变量)是否有一个等于零，如果是则调用PostQuitMessage结束程序。如果不成立就检查窗口过程参数hwnd是hwnd1或hwnd2中的哪个,然后把hwnd赋值给它，并令它为零.

Answer 3

LRESULT SendMessage(          
    HWND hWnd,   //你要关闭窗口句柄
    UINT Msg,    
    WPARAM wParam,
    LPARAM lParam
);
SendMessage(hwnd1,WM_CLOSE,0,0,); //关闭第1个
SendMessage(hwnd2,WM_CLOSE,0,0,); //关闭第2个