int nCfgs, i;
    GLXFBConfig* cfgs;
	
	cfgs = pglXGetFBConfigs(display, DefaultScreen(display), &nCfgs);

    BOOL exists = FALSE;
    for(i=0; i<nCfgs; i++)
    {
        int value;
       pglXGetFBConfigAttrib(gdi_display, cfgs[i], GLX_SWAP_METHOD_OML, &value);

       if(value == GLX_SWAP_EXCHANGE_OML)
           exists = TRUE;
    }