C / C++ / MFC

Inventory^ frm2 = gcnew Inventory();

Form^ frm1 = Application::OpenForms["Form1"];

this->Size = System::Drawing::Size(124,20);
this->CenterToScreen();
this->TopMost = false;

frm2->Show();
frm2->TopMost = true;

void CEncryptorView::OnBnClickedOk()
{ 
  	CString strControlText;    
	CWnd* pWnd = GetDlgItem(IDC_FILE);
	pWnd->GetWindowText(_T(strControlText));  

	char buf[255];
	
	//open the selected file for encryption
	ifstream fp_in(strControlText, ios_base::binary | ios_base::in);

	unsigned int cntr = 0; //defining a controll variable;
	if(!fp_in)
	{
		++cntr;
		MessageBox("The selected file couldn't be open for reading");
	}
	ofstream fp_out("temp.txt",	ios_base::binary | ios_base::out);
	if(!fp_out)
	{
		++cntr;
		MessageBox("\tThe temp file couldn't be created \n(check you access privileges for default destination!)");
	}

	//encrypting the file, taking each byte in the file and increment it
	if ( fp_in && fp_out )
	{
		char ch;
		while ( fp_in.get ( ch ) )
		  fp_out.put ( ++ch );
	}
	else
		++cntr;

	fp_in.close();
	fp_in.clear();
	fp_out.close();
	fp_out.clear();

	//copying (replacing) the encrypted temp file into the original file, and deleting the tempoarary one
	ifstream fs_in("temp.txt", ios_base::binary | ios_base::in);
	if(!fs_in)
	{
		++cntr;
		MessageBox("An error occured and the encryption failed");
	}
	ofstream fs_out(strControlText,	ios_base::binary | ios_base::out);
	if(!fs_out)
	{
		++cntr;
		MessageBox("An error occured and the encryption failed");
	}

	if ( fs_in && fs_out )
	{
		char ch;
		while ( fs_in.get ( ch ) )
		  fs_out.put ( ch );
	}
	else
		++cntr;

	fs_in.close();
	fs_in.clear();
	fs_out.close();
	fs_out.clear();

	//delete the temp file
	CString fileToDelete("temp.txt");
	if(remove(fileToDelete) == 0 && cntr == 0)
		MessageBox("The file has ben encrypted successfully");
	else
		MessageBox("An error occured and the encryption failed");
}