C语言实现界面（不通过MFC避免遗忘）

感觉MFC不属于程序员细究的东西，今实现基本界面避免日后遗忘。
源代码：
  1 #include<windows.h>
  2 #include<stdio.h>
  3 char str[] = {'0'};
  4 char cmd[] = {'0'}; 
  5 //char hour[10], minute[10];
  6 int num;
  7 int num_text_hour, num_text_minute;
  8 //char num_str[]; 
  9 LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
 10 int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance, LPSTR lpCmdLine,int nCmdShow)
 11 {
 12 HWND hWnd;
 13 MSG Msg;
 14 WNDCLASS WndClass;
 15 WndClass.style=CS_HREDRAW|CS_VREDRAW;
 16 WndClass.lpfnWndProc=WndProc;
 17 WndClass.cbClsExtra=0;
 18 WndClass.cbWndExtra=0;
 19 WndClass.hInstance=hInstance;
 20 WndClass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
 21 WndClass.hCursor=LoadCursor(NULL,IDC_ARROW);
 22 WndClass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
 23 WndClass.lpszMenuName=NULL;
 24 WndClass.lpszClassName="Hello Win"; //窗口类名
 25 //注册窗口
 26 if(!RegisterClass(&WndClass))
 27 {
 28 MessageBox(NULL,"窗口注册失败!","Hello Win",0);
 29 return 0;
 30 }
 31 //创建窗口
 32 hWnd=CreateWindow("Hello Win", "定时关机--junmuzi", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL);
 33 //显示窗口
 34 ShowWindow(hWnd,nCmdShow); 
 35 //更新窗口
 36 UpdateWindow(hWnd);
 37 //进入消息循环：当从应用程序消息队列中捡取的消息是WM_QUIT时，则推出循环
 38 while(GetMessage(&Msg,NULL,0,0))
 39 {
 40 TranslateMessage(&Msg); //转换键盘消息
 41 DispatchMessage(&Msg); //分发消息
 42 }
 43 return Msg.wParam;
 44 }
 45 
 46 
 47 LRESULT CALLBACK WndProc(HWND hWnd,UINT message,WPARAM wParam,LPARAM lParam)
 48 {
 49 HDC hDC;
 50 PAINTSTRUCT Ps;
 51 char strEdit_hour[10], strEdit_minute[10];
 52 static HWND hWndButton_ok, hWndButton_cancel, hWndEdit_hour, hWndEdit_minute;
 53 switch(message)
 54 {
 55 case WM_CREATE:
 56 hWndEdit_hour = CreateWindow("edit",NULL,WS_CHILD|WS_VISIBLE|WS_BORDER,10,60,100,25,hWnd,NULL,NULL,NULL);
 57 hWndEdit_minute = CreateWindow("edit",NULL,WS_CHILD|WS_VISIBLE|WS_BORDER,180,60,100,25,hWnd,NULL,NULL,NULL);
 58 hWndButton_ok = CreateWindow("button","确定",WS_CHILD|WS_VISIBLE|WS_BORDER, 340, 60, 100, 25, hWnd,NULL,NULL,NULL);
 59 hWndButton_cancel = CreateWindow("button","取消定时关机",WS_CHILD|WS_VISIBLE|WS_BORDER, 460, 60, 100, 25, hWnd,NULL,NULL,NULL);
 60 return 0;
 61 case WM_COMMAND:
 62 if(((HWND)lParam==hWndButton_ok)&&(HIWORD(wParam)==BN_CLICKED))
 63 //按下按键hWndButton_ok
 64 { 
 65 num_text_hour = GetWindowText(hWndEdit_hour,strEdit_hour,10); //获取编辑框控件hour的内容 
 66 //sprintf(str,"The result is: %s",strEdit_hour);
 67 //sprintf(hour, "%s", strEdit_hour); 
 68 if (num_text_hour == 0) 
 69 {
 70 MessageBox(NULL,"小时不能为空!","错误信息：", MB_OK);
 71 } 
 72 num_text_minute = GetWindowText(hWndEdit_minute,strEdit_minute,10); //获取编辑框控件minute的内容
 73 if (num_text_minute == 0) 
 74 {
 75 MessageBox(NULL,"分钟不能为空!","错误信息：", MB_OK);
 76 } 
 77 if (!((atoi(strEdit_hour) >= 0) && (atoi(strEdit_minute) >= 0) && (atoi(strEdit_minute) <= 60)))
 78 {
 79 MessageBox(NULL,"非法输入（输入的小时必须大于等于0，输入的分钟必须大于等于0,且小于等于60）","错误信息：", MB_OK);
 80 } 
 81 if ((num_text_hour != 0) && (num_text_minute != 0) && (atoi(strEdit_hour) >= 0) && (atoi(strEdit_minute) >= 0) && (atoi(strEdit_minute) <= 60))
 82 { 
 83 num = atoi(strEdit_hour) * 3600 + atoi(strEdit_minute) * 60; //把小时和分钟数转化为多少秒 
 84 //itoa(num, num_str, 10); 
 85 //sprintf(str,"The result is: %s",strEdit_minute);
 86 //sprintf(minute, "%s", strEdit_minute); 
 87 //strcat(cmd, str_); 
 88 //sprintf(cmd, "shutdown -s -t %s %s %d", strEdit_hour, strEdit_minute, num);
 89 sprintf(cmd, "shutdown -s -t %d", num); // 定时关机命令 
 90 sprintf(str, "电脑会在%s小时%s分钟后关机！！！", strEdit_hour, strEdit_minute);
 91 system(cmd); //shutdown the computer. 
 92 InvalidateRect(hWnd,NULL,TRUE);
 93 } 
 94 }
 95 if(((HWND)lParam == hWndButton_cancel)&&(HIWORD(wParam) == BN_CLICKED))
 96 //按下按键hWndButton_cancel
 97 { 
 98 sprintf(cmd, "shutdown -a"); //取消定时关机 
 99 sprintf(str, "电脑定时关机被取消！！！");
100 system(cmd); //cancel ”shutdown the computer“. 
101 InvalidateRect(hWnd,NULL,TRUE);
102 } 
103 case WM_PAINT://设计编辑框
104 hDC=BeginPaint(hWnd,&Ps);
105 TextOut(hDC,10,10,"请输入你要设置的多长时间后关机（小时和分钟数）：",48);
106 TextOut(hDC,120,60,"小时",4);
107 TextOut(hDC,290,60,"分钟",4);
108 //TextOut(hDC,10,90,str,strlen(str));
109 TextOut(hDC,10,90,str,strlen(str));
110 EndPaint(hWnd,&Ps);
111 return 0;
112 case WM_DESTROY:
113 PostQuitMessage(0);
114 return 0;
115 }
116 return DefWindowProc(hWnd,message,wParam,lParam);
117 }
118 
119  
120 
121 //实现自动关机的程序