how to add a custom ui with vc++ for mt4.

[hxh001]

i need to custom a ui for  special chart,the program i wrote as following:

1.mql script

#import "MyChartDLL.dll" 

void CreateUI(int hwin); 

#import 

 int winHandle=WindowHandle("USDCADf",PERIOD_H1); 

    int winHandle=WindowHandle("Lljr",PERIOD_H1);

   if(winHandle==0){

        Alert("(Lljr Script Error:#8001) An error occurred while initializing script.");

       return;                                         

   }

   //hTerminal = GetAncestor(WindowHandle(Symbol(), Period()), 2);

   Print("winHandle=",winHandle);

   CreateUI(winHandle);

 2.vc++ code 

void CreateUI(int hwin){

HWND handle=(HWND) hwin;

hWinChart=handle;

CWnd* win=CWnd::FromHandle(handle); 

 CView *pNewView=NULL;

pNewView=new CFView(); 

CCreateContext context;

BOOL rtVal= pNewView->Create(_T("CFView"),_T("CFView"),WS_CHILD | WS_VISIBLE | WS_MAXIMIZE,CFrameWnd::rectDefault,

win, IDD_FORMCHARTUI);

pNewView->OnInitialUpdate();

pNewView->ShowWindow(SW_SHOW);  //显示新的视图

pNewView->SetDlgCtrlID(AFX_IDW_PANE_FIRST);

if(rtVal){ MessageBox(NULL,_T("it is ok!"),_T("Information"), 0); } else{ MessageBox(NULL,_T("it is failure!"),_T("Information"), 0); } 

}

the result come with an error,and no ui was showed:

 2015.03.27 11:28:37.960 Access violation read to 0xDDDDDF6D in 'C:\Users\Administrator\AppData\Roaming\MetaQuotes\Terminal\FF6486332E05B65B7E995E1DD5B90FBE\MQL4\Libraries\MyChartDLL.dll'

please give me a help.