[Dev-C++] file handle error

[Noorez K. <lor...@ho...>]

The open file function of my program appears to be crashing at the line I 
marked, when I run the debugger. There might be some other problem causing 
it. The function is below:

#include "SML.h"

// Function called from WindowProcedure to open text
void OpenText(HWND main, HWND hEdit)
{
  ifstream openTextFile; // Handle to file

  // Filter files visible in the open dialog box
  char* filter = "Text Files (*.txt)\0*.txt\0All Files (*.*)\0*.*\0\0";

  std::string inLine;
  char* toEditControl;

  int nLength;

  // Init the properties of the open dialog box
  getOFNproperties(main, &dialogProperties, currentFileName, filter);

  // Show the dialog and get the information
  if( !GetOpenFileName(&dialogProperties) )
  {
    return; // Return if user cancels
  }

  openTextFile.open(currentFileName);
  SetDlgItemText(main, IDC_MAIN_EDIT, ""); // Clear the edit contro

  int cntr = 1;

  // Loop unitl the end of file is reached
  while( !openTextFile.eof() && !openTextFile.fail()  )
  {
    nLength = GetWindowTextLength(GetDlgItem(main, IDC_MAIN_EDIT));
    getline(openTextFile,inLine);
    toEditControl = (char*)inLine.c_str();

     //A new line must have a "\r\n" so test for both
    if( toEditControl[ strlen(toEditControl) -1 ] != '\r' )
    {
      strcat(toEditControl,"\r");
    }
    if( inLine[ strlen(toEditControl) -1] != '\n' )
    {
      strcat(toEditControl,"\n");
    }

    // And the message onto the edit control
    SendMessage( GetDlgItem(main, IDC_MAIN_EDIT), EM_SETSEL, 
(WPARAM)nLength,
                 (LPARAM)nLength );

    SendMessage( GetDlgItem(main, IDC_MAIN_EDIT), EM_REPLACESEL, 
(WPARAM)FALSE,
                 (LPARAM)toEditControl );
  }

  untitled = false;
  edited = false;
  openTextFile.close();
  return;
}

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