What's Wrong with this program

[dfound]

#include<windows.h>
#include<dos.h>
#include<dir.h>
#include<fstream.h>
#include<stdio.h>
#include<process.h>
 
#include"resource.h"       //resource header file
 
 
long convert(char *pass)   //to convert password in to long integer
{
long total=0;
for(int i=0;i<strlen(pass);i++)
{
 total+=pass[i];
 }
 total=total;
return(total);
}
 
 
int check(char *p)     // to check if the path entered is a file or directory
{
int done;
struct ffblk ffblk;
done=findfirst(p,&ffblk,0);
while(!done)
{
if(ffblk.ff_attrib&&FA_DIREC)    //returns 1 if its a directory
return(1);
done=findnext(&ffblk);
}
return(0);
}
 
int encode(char *path,int op,char *pass) //fuction to encode file
{
long password=0;
int done;
char ch;
double ctr;
ifstream fin;
ofstream fout;
struct ffblk ffblk;
switch(op)
{
case 0:ctr=0;
        password=convert(pass);
       fin.open(path,ios::in|ios::binary);
       fout.open(path,ios::out|ios::ate|ios::nocreate|ios::binary);
       if(!fin||!fout)     //place where something goes wrong I think
       return(-1);
       while(!fin.eof())
       {
        fin.seekg(ctr);
        fin.get(ch);         //reading each character
        if(fin.eof())
        break;
        ch=int(ch+password); //adding some value to character(encoding)
        fout.seekp(ctr);
        fout.put(ch);
        ctr++;
        }
        fout.flush();
        fin.close();
        fout.close();
        break;
 
case 1:chdir(path);         //changing directory if the entere path is a folder
       done=findfirst("*.*",&ffblk,0);     //searching every file
       while(!done)
       {
       encode(ffblk.ff_name,0,pass);  
       done=findnext(&ffblk);
       }
       break;
default:return(-1);
}
return(0);
}
 
int decode(char *path,int op,char *pass) //to decode file:similar to encode
{
long password=0;
int done;
char ch;
double ctr;
ifstream fin;
ofstream fout;
struct ffblk ffblk;
if(op==-1)
return(-1);
switch(op)
{
case 0:ctr=0;
        password=convert(pass);
       fin.open(path,ios::in|ios::binary);
       fout.open(path,ios::out|ios::ate|ios::nocreate|ios::binary);
       if(!fout||!fin)
       return(-1);
       while(!fin.eof())
       {
        fin.seekg(ctr);
        fin.get(ch);
        if(fin.eof())
        break;
        ch=ch-int(password);
        fout.seekp(ctr);
        fout.put(ch);
        ctr++;
        }
        fout.flush();
        fin.close();
        fout.close();
        break;
case 1:chdir(path);
       done=findfirst("*.*",&ffblk,0);
       while(!done)
       {
       decode(ffblk.ff_name,0,pass);
       done=findnext(&ffblk);
       }
       break;
}
return(0);
}
 
 
//No problem here I think.Here's where the dialog box stuff go
 
BOOL CALLBACK DlgProc(HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam)
{
switch(msg)
{
case WM_INITDIALOG:SetDlgItemText(hwnd,IDC_TEXT_I,""); 
              SetDlgItemText(hwnd,IDC_TEXT_II,"");
              break;
case WM_COMMAND   :
                   switch(LOWORD(wParam))
                   {
                   case IDC_ENCODE:{
                   int len1=GetWindowTextLength(GetDlgItem(hwnd,IDC_TEXT_I));
                   int len2=GetWindowTextLength(GetDlgItem(hwnd,IDC_TEXT_II));
                   if(len1>0&&len2>0)
                   {
                    char *buf1,*buf2;
                    buf1=(char*)GlobalAlloc(GPTR,len1+1);
                    buf2=(char*)GlobalAlloc(GPTR,len2+1);
                    GetDlgItemText(hwnd,IDC_TEXT_I,buf1,len1+1);
                    GetDlgItemText(hwnd,IDC_TEXT_II,buf2,len2+1);
                    int i=check(buf1);
                    int e=encode(buf1,i,buf2);
                    if(e==0)
                    {
                    MessageBox(hwnd,"ENCODING COMPLETED","REPORT",MB_OK|MB_ICONINFORMATION);
                    SetDlgItemText(hwnd,IDC_TEXT_I,"");
                    SetDlgItemText(hwnd,IDC_TEXT_II,"");
                    }
                    else if(e==-1)
                    {
                    MessageBox(hwnd,"ERROR IN ENCODING PROCESS","REPORT",MB_OK|MB_ICONEXCLAMATION);//This shows up as error
 
                    }
                    GlobalFree((HWND)buf1);
                    GlobalFree((HWND)buf2);
                    }
                    else
                    {
                    MessageBox(hwnd,"PARAMETER(S) MISSING","WARNING",MB_OK|MB_ICONEXCLAMATION);
                    }}
                    break;
                    case IDC_DECODE:{
                   int len1=GetWindowTextLength(GetDlgItem(hwnd,IDC_TEXT_I));
                   int len2=GetWindowTextLength(GetDlgItem(hwnd,IDC_TEXT_II));
                   if(len1>0&&len2>0)
                   {
                    char *buf1,*buf2;
                    buf1=(char*)GlobalAlloc(GPTR,len1+1);
                    buf2=(char*)GlobalAlloc(GPTR,len2+1);
                    GetDlgItemText(hwnd,IDC_TEXT_I,buf1,len1+1);
                    GetDlgItemText(hwnd,IDC_TEXT_II,buf2,len2+1);
                    int i=check(buf1);
                    int e=decode(buf1,i,buf2);
                    if(e==0)
                    {
                    MessageBox(hwnd,"ENCODING COMPLETED","REPORT",MB_OK|MB_ICONINFORMATION);
                    SetDlgItemText(hwnd,IDC_TEXT_I,"");
                    SetDlgItemText(hwnd,IDC_TEXT_II,"");
                    }
                    else if(e==-1)
                    {
                    MessageBox(hwnd,"ERROR IN DECODING PROCESS","REPORT",MB_OK|MB_ICONEXCLAMATION);//This shows up as error
                    }
                    GlobalFree((HWND)buf1);
                    GlobalFree((HWND)buf2);
                    }
                    else
                    {
                    MessageBox(hwnd,"PARAMETER(S) MISSING","WARNING",MB_OK|MB_ICONEXCLAMATION);
                    }}
                    break;
                    case IDC_about:MessageBox(hwnd,"FE for WINDOWS\r\n   -by-  \r\nRAHUL.ES\r\nCreated:18-2-07\r\nContact:[e-mail]","ABOUT",MB_ICONINFORMATION|MB_OK);
                    break;
                    }
                    break;
case WM_CLOSE       : EndDialog(hwnd,0);
                      break;
default             : return FALSE;
}
return TRUE;
} 
 
 
//WinMain
 
int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine, int nCmdShow)
{
HICON hMyIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_MYICON));
 
return DialogBox(hInstance, MAKEINTRESOURCE(IDD_MAIN), NULL, DlgProc)
;
}
 
 

The above program is a simple program using WinApi to encode and decode files.But every time I execute it,the dialog box mentioned above in the comments appear.I can't figure out how to correct the error...

Please Help.... :-)

[DeMan]

Looks to me like that's what it does......sorry maybe I don't understand ur question

[RedSon]

The dialog box does appear, what is your problem exactly?

[dfound]

Sorry,I meant the Message Box ,not Dialog Box.The Message Box appears saying "ERROR DURING ENCODING PROCESS"
What should I do???