C++ (Qt)
/// Вызов окна диалога для выбора открываемого файла
QString getOpenFileName(QWidget* parent, const char* caption, const char* directory, const char* filter)
{
	const int NAME_SIZE = 550;
	char fname[NAME_SIZE] = {0};		///< буфер для имени файла
	bool result = false;
 
#ifdef Q_WS_WIN
	OPENFILENAME ofn;					///< структура диалога открытия файла
	::ZeroMemory(&ofn, sizeof(ofn));
	ofn.lStructSize = 88;
	ofn.hwndOwner = (parent) ? parent -> winId() : 0;
	ofn.lpstrFile = fname;
	ofn.nMaxFile = sizeof(fname);
	ofn.lpstrFilter = filter;
	ofn.nFilterIndex = 0;
	ofn.lpstrFileTitle = 0;
	ofn.nMaxFileTitle = 0;
	ofn.lpstrInitialDir = directory;
	ofn.lpstrTitle = caption;
	ofn.Flags = OFN_EXPLORER | OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;
 
	if(::GetOpenFileName(&ofn) == 1) result = true;
#endif // Q_WS_WIN
 
	return (result) ? QString(fname) : QString("");
}
 
/// Вызов окна диалога для выбора открываемых файлов
QStringList getOpenFileNames(QWidget* parent, const char* caption, const char* directory, const char* filter)
{
	const int NAME_SIZE = 5500;
	char fname[NAME_SIZE] = {0};		///< буфер для имени файла
	QStringList list;
 
#ifdef Q_WS_WIN
	OPENFILENAME ofn;					///< структура диалога открытия файла
	::ZeroMemory(&ofn, sizeof(ofn));
	ofn.lStructSize = 88;
	ofn.hwndOwner = (parent) ? parent -> winId() : 0;
	ofn.lpstrFile = fname;
	ofn.nMaxFile = sizeof(fname);
	ofn.lpstrFilter = filter;
	ofn.nFilterIndex = 0;
	ofn.lpstrFileTitle = 0;
	ofn.nMaxFileTitle = 0;
	ofn.lpstrInitialDir = directory;
	ofn.lpstrTitle = caption;
	ofn.Flags = OFN_ALLOWMULTISELECT | OFN_EXPLORER | OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;
 
	if(::GetOpenFileName(&ofn) == 1)
	{
		if(ofn.nFileExtension)
			list << QString(fname);
		else if(ofn.nFileOffset)
		{
			QString path(QString(fname) + QDir::separator()), name("");
			for(int i=ofn.nFileOffset, j=ofn.nFileOffset+1; fname[i]!=0 || fname[j]!=0 || j<sizeof(fname); ++i,
				++j)
			{
				if(fname[i] != 0)
					name += QChar(fname[i]);
				if(fname[j] == 0)
					list << QString(path + name),
					name.clear(),
					++i, ++j;
				if(fname[i] == 0 && fname[j] == 0)
					break;
			}
		}
	}
#endif // Q_WS_WIN
 
	return list;
}

C++ (Qt)
    ofn->Flags = (OFN_NOCHANGEDIR | OFN_HIDEREADONLY | OFN_EXPLORER);
 
    if (mode == QFileDialog::ExistingFile ||
         mode == QFileDialog::ExistingFiles)
        ofn->Flags |= (OFN_FILEMUSTEXIST | OFN_PATHMUSTEXIST);
    if (mode == QFileDialog::ExistingFiles)
        ofn->Flags |= (OFN_ALLOWMULTISELECT);
    if (!(options & QFileDialog::DontConfirmOverwrite))
        ofn->Flags |= OFN_OVERWRITEPROMPT;