[ucgui] 子窗口父窗口

它创建了3个窗口:

• 第一个作为桌面的子窗口
• 第二个作为第一个窗口的子窗口
• 第三个作为第二个窗口的子窗口

窗口创建后，使用WM_ForEachDesc()在其父窗口中移动各个窗口：

 static void _cbWin(WM_MESSAGE * pMsg) {
     GUI_COLOR Color;
     switch (pMsg->MsgId) {
         case WM_PAINT:
         WM_GetUserData(pMsg->hWin, &Color, );
         GUI_SetBkColor(Color);
         GUI_Clear();
         break;
         default:
         WM_DefaultProc(pMsg);
     }
 }
 /*********************************************************************
 *
 * _cbDoSomething
 */
 static void _cbDoSomething(WM_HWIN hWin, void * p) {
     int Value = *(int *)p;
     WM_MoveWindow(hWin, Value, Value);
 }
 /*********************************************************************
 *
 * MainTask
 */
 void Fun(void) {
     WM_HWIN hWin_1, hWin_2, hWin_3;
     int Value = ;
     GUI_COLOR aColor[] = {GUI_RED, GUI_GREEN, GUI_BLUE};
     GUI_Init();
     WM_SetDesktopColor(GUI_BLACK);
     hWin_1 = WM_CreateWindow( , , , , WM_CF_SHOW, _cbWin, );
     hWin_2 = WM_CreateWindowAsChild(, , , , hWin_1, WM_CF_SHOW, _cbWin, );
     hWin_3 = WM_CreateWindowAsChild(, , , , hWin_2, WM_CF_SHOW, _cbWin, );
     WM_SetUserData(hWin_1, &aColor[], );
     WM_SetUserData(hWin_2, &aColor[], );
     WM_SetUserData(hWin_3, &aColor[], );
     while () {
         WM_ForEachDesc(WM_HBKWIN, _cbDoSomething, (void *)&Value);
         Value *= -;
         GUI_Delay();
     }
 }

• 前两个为回调函数，Fun函数为主函数，建立3个窗口
• WM_HWIN WM_CreateWindow(int x0, int y0,
  int width, int height,
  U8 Style, WM_CALLBACK * cb
  int NumExtraBytes);
• WM_HWIN WM_CreateWindowAsChild(int x0, int y0,
  int width, int height,
  WM_HWIN hWinParent,
  U8 Style,
  WM_CALLBACK* cb
  int NumExtraBytes);
• void WM_ForEachDesc(WM_HWIN hWin, WM_tfForEach * pcb, void * pData);