MFC编程的一个奇怪问题，连接编译都通过，点运行不出现对话框。求助！

如题，这个怎么回事啊，各位高手解决下！
我在一个对话框上添加了几个按钮，一个编辑框，一个列表框。程序运行成功。但当我加了一个按钮，一个列表框，要将前一个对话框的内容转换一定格式输出到另一个列表框就出现如上问题。按钮里的程序如下：
    CString temp;
int k;
char SS[100];
for(k=0;k<m_codeList.GetCount();k=k+1)
{
    FILE*pfile=fopen("D:\\转换.txt","a+w");
    m_codeList.GetText(k,temp);
    strcpy(SS,temp);
    char *p=SS;
    int n=strlen(SS);
    int i=0,j=0;
    while(*p!=NULL)
    {
        switch(*p)
        {   
         case 'G':
             switch(*(p+1))
             {
              case '0':
                   switch(*(p+2))
                   {
                    case '0':
                       *p='M';
                       *(p+1)='O';
                       *(p+2)='V';
                       break;
                    case '1':
                       *p='M';
                       *(p+1)='O';
                       *(p+2)='V';
                       break;
                    case '2':
                       for(j=0;j<n-i;j++)
                       *(p+n-i-j+2)=*(p+n-i-j);
                       *p='C';
                       *(p+1)='I';
                       *(p+2)='R';
                       *(p+3)='C';
                       *(p+4)='W';
                       break;
                    case '3':
                       for(j=0;j<n-i;j++)
                       *(p+n-i-j+3)=*(p+n-i-j);
                       *p='C';
                       *(p+1)='I';
                       *(p+2)='R';
                       *(p+3)='C';
                       *(p+4)='C';
                       *(p+5)='W';
                       break;
                   }
             break;
             }
        break;
        }
        p++;
        i++;
   
    }
    temp=SS;
    m_List1.InsertString(m_List1.GetCount(), temp);
}