【笔记】理解Windows窗体产生的机制 

 1 #include<Windows.h>
 2 #include<stdio.h>
 3 LRESULT CALLBACK WinSunProc(     
 4     HWND hwnd,
 5     UINT uMsg,
 6     WPARAM wParam,
 7     LPARAM lParam
 8 );
 9 int WINAPI WinMain(         
10     HINSTANCE hInstance,
11     HINSTANCE hPrevInstance,
12     LPSTR lpCmdLine,
13     int nCmdShow
14 )
15 {
16     WNDCLASS wndcls;
17     wndcls.cbClsExtra=0;
18     wndcls.cbWndExtra=0;
19     wndcls.hbrBackground=(HBRUSH) GetStockObject(BLACK_BRUSH);
20     wndcls.hCursor=LoadCursor(NULL,IDC_CROSS);
21     wndcls.hIcon=LoadIcon(NULL,IDI_ERROR);
22     wndcls.hInstance =hInstance;
23     wndcls.lpfnWndProc=WinSunProc;
24     wndcls.lpszClassName="aa";
25     wndcls.lpszMenuName=NULL;
26     wndcls.style=CS_HREDRAW|CS_VREDRAW;
27     RegisterClass(&wndcls);
28     HWND hwnd;
29     hwnd=CreateWindow("aa","哈哈",WS_OVERLAPPEDWINDOW,0,0,600,400,NULL,NULL,hInstance,NULL);
30     ShowWindow(hwnd,SW_SHOWNORMAL);
31     UpdateWindow(hwnd);
32     MSG msg;
33     while (GetMessage(&msg,NULL,0,0))
34     {
35         TranslateMessage(&msg);
36         DispatchMessage(&msg);
37 
38     }
39     return 0;
40 }
41 LRESULT CALLBACK WinSunProc(     
42     HWND hwnd,
43     UINT uMsg,
44     WPARAM wParam,
45     LPARAM lParam
46 )
47 {
48     switch(uMsg)
49     {
50         case WM_CHAR:
51             char szChar[20];
52             sprintf(szChar,"Char is %d",wParam);
53             MessageBox(hwnd,szChar,"aa",0);
54             break;
55         case WM_LBUTTONDOWN:
56             MessageBox(hwnd,"Mouse clicked","aa",0);
57             HDC hdc;
58             hdc=GetDC(hwnd);
59             TextOut(hdc,0,50,"计算机编程语言",strlen("计算机编程语言"));
60             ReleaseDC(hwnd,hdc);
61 
62             break;
63         case WM_PAINT:
64             HDC hDC;
65             PAINTSTRUCT ps;
66             hDC=BeginPaint(hwnd,&ps);
67             TextOut(hDC,0,0,"hahahah",strlen("hahahah"));
68             EndPaint(hwnd,&ps);
69             break;
70         case WM_CLOSE:
71             if (IDYES==MessageBox(hwnd,"是否真的结束?","fb",MB_YESNO))
72             {
73                 DestroyWindow(hwnd);
74             }
75             break;
76         case WM_DESTROY:
77             PostQuitMessage(0);
78             break;
79         default:
80             return DefWindowProc(hwnd,uMsg,wParam,lParam);
81     }
82     return 0;
83 }

问题：error C2664: “CreateWindowExW”: 不能将参数 2 从“const char [7]”转换为“LPCWSTR”

可以这样解决（VS2008中），项目->属性—>配置属性->C/C++->预处理器—>预处理器定义->单击浏览按钮，去掉从父级和项目设置继承

posted @ 2012-10-11 10:21  太一吾鱼水  阅读(256)  评论(0)  编辑  收藏  举报