C / C++ / MFC

#include <Windows.h>
#include "resource.h"

WNDPROC OldEditProc;
HINSTANCE hInst;
HFONT hFont;
	
WNDPROC SUBCLASS(HWND hControl,WNDPROC newWindowProc)
{
	return (WNDPROC)SetWindowLong(hControl,GWL_WNDPROC,(LONG)newWindowProc);
}


LRESULT CALLBACK EditProc(HWND hWnd,UINT Msg, WPARAM wParam, LPARAM lParam)
{
	switch(Msg)
	{
	case WM_CREATE:
		SetWindowText(hWnd,L"Welcome");
		break;
	}
	return OldEditProc(hWnd,Msg,wParam,lParam);
}

LRESULT CALLBACK stdEditProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{

	switch(Msg)
	{
	case WM_INITDIALOG:
		OldEditProc = SUBCLASS(GetDlgItem(hWnd,IDC_EDIT1),EditProc);
		break;
	case WM_CLOSE:
		EndDialog(hWnd,TRUE);
		break;
	}
	return FALSE;
}

INT APIENTRY wWinMain( __in HINSTANCE hInstance, __in_opt HINSTANCE hPrevInstance, __in_opt LPWSTR lpCmdLine, __in int nShowCmd )
{
	hInst = hInstance;
	return DialogBox(hInst,MAKEINTRESOURCE(IDD_DIALOG1),NULL,(DLGPROC)stdEditProc);
}

string line;
ifstream myfile("data/secretFile");
if (myfile.is_open())
  while ( myfile.good() )
  {
    getline (myfile,line);
    cout << line << endl;
  }
  myfile.close();
}
else cout << "Unable to open file, it's probably might not a text file" << endl;