shellexecuteex

[Voominibear]

i am using ShellExecuteEx to call the properties wizard of a zip file from a floatmenu but the program always reports errors

when i change the file into a txt file or a bin folder, it works

switch(LOWORD(pMsg->wParam))
        {
        case IDC_FMENUPROPERTY:
            const TCHAR* verb=_T("properties");

            if(-1!=index)
            {
                
                SHELLEXECUTEINFO shellExInfo;
                
                shellExInfo.cbSize=sizeof(SHELLEXECUTEINFO);
                shellExInfo.fMask=NULL;
                shellExInfo.hwnd=NULL;

                CString fn=_T("keinnie05.zip")

                shellExInfo.lpVerb=verb;
                shellExInfo.lpFile=fn;            

                shellExInfo.hIcon=NULL;
                shellExInfo.lpParameters=NULL;
                shellExInfo.lpDirectory=NULL;
                shellExInfo.lpIDList=NULL;

                shellExInfo.nShow=SW_SHOWNORMAL;            
                
                ShellExecuteEx(&shellExInfo);
            
            }
} 

Thanks for any help