wxURL url(dlg.ThankYou());
    wxInputStream *in_stream;
    in_stream = url.GetInputStream();
    wxOutputStream *out_stream = new wxOutputStream();
    in_stream->Read(*out_stream);
// breaks here

    wxString stringy;
    out_stream->Write(stringy, out_stream->GetSize());
    wxMessageBox(stringy);

    wxFileSystem* temp = new wxFileSystem();
    wxInputStream *in_stream;
    wxOutputStream *out_stream;
    in_stream = (temp->OpenFile(dlg.ThankYou()))->GetStream();    
    in_stream->Read(*out_stream);

NIB2.EXE caused an Access Violation at location 00450c47 in module NIB2.EXE Reading from location 13dfffff.

Registers:
eax=00001000 ebx=00001000 ecx=009efbb4 edx=13dfffff esi=00b1e9a0 edi=009ee7e0
eip=00450c47 esp=009ee7cc ebp=009ef7f8 iopl=0         nv up ei pl nz ac po nc
cs=0167  ss=016f  ds=016f  es=016f  fs=3bef  gs=0000             efl=00010216

Call stack:
00450C47  NIB2.EXE:00450C47
004024C7  NIB2.EXE:004024C7  MyFrame::NewDomainSearch(wxCommandEvent&)  MyFrame.cpp:77
   ...
       wxOutputStream *out_stream;
       in_stream = (temp->OpenFile(dlg.ThankYou()))->GetStream();   
>        in_stream->Read(*out_stream);
      
      
   ...

0043537A  NIB2.EXE:0043537A
004351CD  NIB2.EXE:004351CD
0042671E  NIB2.EXE:0042671E
0040677C  NIB2.EXE:0040677C
00406528  NIB2.EXE:00406528
00415920  NIB2.EXE:00415920
BFF7363B  KERNEL32.DLL:BFF7363B  EnumSystemCodePagesW
BFF94407  KERNEL32.DLL:BFF94407  CopyFileExW
009E8BEA

wxURL url("http://www.google.de" rel="nofollow" target="_blank" class="bt">http://www.google.de");
    wxInputStream *in_stream;
    in_stream = url.GetInputStream();
    wxFileOutputStream *out_stream = new wxFileOutputStream("mock.txt");
    in_stream->Read(*out_stream);

wxString UrlError(int a)
{
wxString temp;
switch(a)
{
case wxURL_NOERR:  temp =  "No error";break;  
case wxURL_SNTXERR:  temp =  "Syntax error in the URL string.";break;  
case wxURL_NOPROTO:  temp =  "Found no protocol which can get this URL.";break;  
case wxURL_NOHOST:  temp =  "An host name is required for this protocol.";break;  
case wxURL_NOPATH:  temp =  "A path is required for this protocol.";break;  
case wxURL_CONNERR:  temp =  "Connection error.";break;  
case wxURL_PROTOERR:  temp =  "An error occurred during negotiation.";break;
default: temp =  "Unknown error";break;
}
return temp;
}
int GetAsString(wxString& ac, wxString ca)
{
    wxURL url(ca);
    if(url.GetError() != wxURL_NOERR )
    {wxMessageBox(UrlError(url.GetError()));
    return -1;}
    wxInputStream *in_stream;
    in_stream = url.GetInputStream();
    if(url.GetError() != wxURL_NOERR )
    {wxMessageBox(UrlError(url.GetError()));
    return -1;}
    wxString buff;
    do{
    in_stream->Read(buff.GetWriteBuf(1024), 1024);
    buff.UngetWriteBuf();
    ac += buff;
    } while((in_stream->Eof()) != TRUE);
    return 1;
}