Question

一个关于Windows SDK 编程中 窗口创建的问题

运行都没有问题，就是我在关闭窗口的时候，我点击是后，窗口是销毁了，但是在进程里还有！ 我在消息处理关于 WM_CLOSE 和WM_DESTROY的时候都感觉没有问题，所以有点不明白到底是怎么回事请！ 请高手指点！

#include<stdio.h>
#include<windows.h>

LRESULT CALLBACK WinSunProc(
HWND hwnd,
UINT uMsg,
WPARAM wParam,
LPARAM lParam
);

int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow
)
{
WNDCLASS wincls;
wincls.cbClsExtra=0;
wincls.cbWndExtra=0;
wincls.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH) ;
wincls.hCursor=LoadCursor(hInstance,IDC_CROSS);
wincls.hIcon=LoadIcon(hInstance,IDI_APPLICATION);
wincls.hInstance=hInstance;
wincls.lpfnWndProc=WinSunProc;
wincls.lpszClassName="windows";
wincls.lpszMenuName=NULL;
wincls.style=CS_VREDRAW|CS_HREDRAW;

RegisterClass(&wincls);

HWND hwnd;
hwnd=CreateWindow("windows","´°¿Ú",WS_OVERLAPPEDWINDOW ,100,100,600,500,
NULL,NULL,hInstance,NULL);

ShowWindow(hwnd,SW_SHOWNORMAL);
UpdateWindow(hwnd);

MSG msg;

while(GetMessage(&msg,hwnd,0,0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
};

return 0;

}

LRESULT CALLBACK WinSunProc(
HWND hwnd,
UINT uMsg,
WPARAM wParam,
LPARAM lParam
)
{
switch(uMsg)
{
case WM_CHAR:
char str[30];
sprintf(str,"you press down the %c ",wParam);
MessageBox(hwnd,str,"°´¼ü",MB_OK);
break;

case WM_PAINT:
HDC hdc;
PAINTSTRUCT ps;
hdc=BeginPaint(hwnd,&ps);
TextOut(hdc,0,0,"ÔÚÖØ»­",strlen("ÔÚÖØ»­"));
EndPaint(hwnd,&ps);
break;

case WM_LBUTTONDOWN:
HDC hDC;
hDC=GetDC(hwnd);
TextOut(hDC,0,50,"I love this game!",strlen("I love this game!"));
MessageBox(hwnd,"mouse click","mouse",MB_OK);
ReleaseDC(hwnd,hDC);
break;

case WM_CLOSE:
if(IDYES==MessageBox(hwnd,"ÄãÕæµÄÒªÍ˳ö","Ìáʾ",MB_YESNO))
{
DestroyWindow(hwnd);
}
break;

case WM_DESTROY:
PostQuitMessage(0);
break;

default:
return DefWindowProc(hwnd,uMsg,wParam,lParam);
}

}

Answer 1

while(GetMessage(&msg,hwnd,0,0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
};
这里有问题
当你DestroyWindow(hwnd);后，hwnd是无效值，在PostQuitMessage就没有意思了，GetMessage()永远不返回0,程序就不结束。
我见过有的程序直接GetMessage(&msg,NULL,0,0)