visual studio 2008 - C++ Convert Sytem::String^ to LPCOLESTR -


i write in mixed mode (c++/cli) , can not resolve problem:

string ^progid = "matrikon.opc.server"; clsid clsid; hresult result = clsidfromprogid(progid, &clsid);

error c2664: 'clsidfromprogid' : cannot convert parameter 1 'system::string ^' 'lpcolestr'

how can convert string^ lpcolestr ?
thanks!

first, lets convert system::string char*

intptr p = marshal::stringtohglobalansi(progid); char *pnewcharstr = static_cast<char*>(p.topointer());

second, casting char * lpcolestr using atl conversion macro:

lpcolestr converted_string = a2cole(pnewcharstr);


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