void select_graphs()
{
	string 	strGraphs;
	open_page_preview_list_dlg(GetWindow(), strGraphs);  // bring up the Graph Browser dialog
	printf("The selected graphs:\n%s\n", strGraphs);  // names of the selected graphs
	
	// separate each graph
	vector<string> vsGraphs;
    int nRet = strGraphs.GetTokens( vsGraphs, STR_PAGE_LIST_SEPARATOR);
    if(nRet > 0)
    {
 		for(int iGraph = 0; iGraph<vsGraphs.GetSize(); iGraph++)   	
    		printf("The graph %d is: %s\n", iGraph+1, vsGraphs[iGraph]);
    }
}

bool open_page_preview_list_dlg(HWND hWndParent, string& strPages, LPCSTR lpcszStartPEpath = NULL, DWORD dwCtrl = SELECT_MULTIPLE_PAGES | SHOW_FOLDERS | ENABLE_EMBEDED, int nPageType = EXIST_GRAPH, LPCSTR lpcszFilterFuncName = NULL);