VC++中MFC建立的应用程序关闭对话框时出现“0x21016d9f指令引用的0xccccccc8内存，该内存不能为read”！
请问高手这是怎么回事？是不是内存释放有问题，或者没有调用析构函数？
部分代码如下：
// bianxiaodlg.cpp : implementation file
//
#include "stdafx.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif


#include "featuremodeling.h"
#include "bianxiaodlg.h"

#include <stdio.h>
#include <math.h>
#include <uf.h>
#include <uf_defs.h>
#include <uf_exit.h>
#include <uf_ui.h>
#include <uf_styler.h>
#include <uf_mb.h>
#include <uf_part_types.h>
#include <uf_part.h>
#include <uf_modl.h>
#include <uf_obj.h>
#include <uf_obj_types.h>
#include <windows.h>
#include <Winuser.h>


/////////////////////////////////////////////////////////////////////////////
// Cbianxiaodlg dialog


Cbianxiaodlg::Cbianxiaodlg(CWnd* pParent /*=NULL*/)
: CDialog(Cbianxiaodlg::IDD, pParent)
{
//{{AFX_DATA_INIT(Cbianxiaodlg)
//}}AFX_DATA_INIT
}


void Cbianxiaodlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(Cbianxiaodlg)

//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(Cbianxiaodlg, CDialog)
//{{AFX_MSG_MAP(Cbianxiaodlg)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()


/////////////////////////////////////////////////////////////////////////////
// Cbianxiaodlg message handlers

BOOL Cbianxiaodlg::OnInitDialog()
{
CDialog::OnInitDialog();

// TODO: Add extra initialization here

UpdateData(TRUE);

    PLD=(CEdit *)GetDlgItem(IDC_EDIT1);
PLR=(CEdit *)GetDlgItem(IDC_EDIT3);
PLn=(CEdit *)GetDlgItem(IDC_EDIT4);
LR=(CEdit *)GetDlgItem(IDC_EDIT5);
L2RT=(CEdit *)GetDlgItem(IDC_EDIT6);
L2A=(CEdit *)GetDlgItem(IDC_EDIT7);
L2B=(CEdit *)GetDlgItem(IDC_EDIT8);


return TRUE;  // return TRUE unless you set the focus to a control
              // EXCEPTION: OCX Property Pages should return FALSE
}


void Cbianxiaodlg::OnOK()
{
// TODO: Add extra validation here



    CString D,R,n,RL,RT,A,B;
    tag_t part,new_part2;
tag_t m_part2=NULL_TAG;
UF_PART_load_status_t error_status;
int num_of_exp=0,i,ok;
char partname[]="E:\\ug1\\WP7_1.prt";

    unsigned int aa=1;
tag_t *exps=&aa,exp_tag;
char *string,*lhs_str,*rhs_str;


int type=1,unit=4;
// char* title=null;
int m_type2;


double exp_value=50;
char cc='q';
char *s=&cc;

    char *p1="PL_D",*p2="PL_R",*p3="PL_n",*p4="L_R",*p5="L2_RT",*p6="L2_A",*p7="L2_B";

UF_UI_selection_options_t opts;
    UF_UI_mask_t mask = {UF_solid_type, 0, UF_UI_SEL_FEATURE_BODY};


/* Make sure User Function is available. */  


    UF_initialize();

    if ( UF_initialize()!= 0)
        // return ( UF_UI_CB_CONTINUE_DIALOG );

MessageBox("初始化失败");

    /* ---- Enter your callback code here ----- */

    opts.num_mask_triples = 5;
    opts.mask_triples = &mask;
    opts.scope = UF_UI_SEL_SCOPE_WORK_PART;


PLD->GetWindowText(D);
PLR->GetWindowText(R);
PLn->GetWindowText(n);
LR->GetWindowText(RL);
L2RT->GetWindowText(RT);
L2A->GetWindowText(A);
L2B->GetWindowText(B);


UF_PART_open(partname,&part,&error_status);

part=UF_PART_ask_display_part();

/* fail=UF_MODL_ask_mass_props_3d(&part,
                              num_part,
                              type,
                                      unit,
                                      density,
                                      accuracy,
                                      acc_val,
                                      massprop,
                                      massprop_stat);
*/
UF_MODL_ask_exps_of_part(part,&num_of_exp,&exps);


for(i=0;i <num_of_exp;i++)
{

UF_MODL_ask_exp_tag_string(exps[i],&string);
UF_MODL_dissect_exp_string(string,&lhs_str,&rhs_str,&exp_tag);
        UF_MODL_eval_exp(lhs_str,&exp_value);


if(strcmp(lhs_str,p1)==0)
{
s=lhs_str;
strcat(s,"=");
rhs_str=(char *)(LPCTSTR)D;
strcat(s,rhs_str);
UF_MODL_edit_exp(s);
}
else if(strcmp(lhs_str,p2)==0)
{
                        rhs_str=(char *)(LPCTSTR)R;
    s=lhs_str;
strcat(s,"=");
strcat(s,rhs_str);
UF_MODL_edit_exp(s);
}
else if(strcmp(lhs_str,p3)==0)
{   
                        rhs_str=(char *)(LPCTSTR)n;
    s=lhs_str;
strcat(s,"=");
strcat(s,rhs_str);
UF_MODL_edit_exp(s);
}
else if(strcmp(lhs_str,p4)==0)
{      
                        rhs_str=(char *)(LPCTSTR)RL;
    s=lhs_str;
strcat(s,"=");
strcat(s,rhs_str);
UF_MODL_edit_exp(s);
}
else if(strcmp(lhs_str,p5)==0)
{
                        rhs_str=(char *)(LPCTSTR)RT;
    s=lhs_str;
strcat(s,"=");
strcat(s,rhs_str);
UF_MODL_edit_exp(s);
}
else if(strcmp(lhs_str,p6)==0)
{
                        rhs_str=(char *)(LPCTSTR)A;
    s=lhs_str;
strcat(s,"=");
strcat(s,rhs_str);
UF_MODL_edit_exp(s);
}
else if(strcmp(lhs_str,p7)==0)
{
                        rhs_str=(char *)(LPCTSTR)B;
    s=lhs_str;
strcat(s,"=");
strcat(s,rhs_str);
UF_MODL_edit_exp(s);
}

}


UF_MODL_update();
new_part2=UF_PART_ask_display_part();
//UF_PART_ask_families(part,&num_part,m_part);
// UF_UI_select_with_class_dialog("Select solid bodies",title,&opts,&response,
    //                              &num,&m_part);
m_type2=UF_solid_type;
UF_OBJ_cycle_objs_in_part( new_part2, m_type2, &m_part2 );


  
  UF_free(lhs_str);
  UF_free(string);
    UF_free(exps);


  //UF_free(m_part);


ok=UF_PART_save();

    UF_terminate ();

CDialog::OnOK();
}

void Cbianxiaodlg::OnCancel()
{
// TODO: Add extra cleanup here

CDialog::OnCancel();
}