🚀 go-pugleaf

"Carlos" <a@a.com> wrote in message 
news:4794f632$1@newsgroups.borland.com...

> I am trying to use Supports function of SysUtils. But I don�t know how

You are passing the interface types the wrong way.  Do not use the '_di_...' 
typedefs.  You need to use the interface IIDs instead, ie:

    TWinControl *pAC = Screen->ActiveControl;
    if( pAC )
    {
        TcxCustomEdit *pCE = NULL;
        if( Supports(pAC, IID_IcxInnerEditHelper) || Supports(pAC, 
IID_IcxContainerInnerControl) )
            pCE = (TcxCustomEdit*) pAC->Owner;
        //...
    }

Or:

    TWinControl *pAC = Screen->ActiveControl;
    if( pAC )
    {
        TcxCustomEdit *pCE = NULL;
        if( Supports(pAC, __uuidof(IcxInnerEditHelper)) || Supports(pAC, 
__uuidof(IcxContainerInnerControl)) )
            pCE = (TcxCustomEdit*) pAC->Owner;
        //...
    }

Or, you could simply use dynamic_cast and ignore Supports() altogether:

    TWinControl * pAC = Screen->ActiveControl;
    if( pAC )
    {
        TcxCustomEdit *pCE = dynamic_cast<TcxCustomEdit*>(pAC->Owner);
        //...
    }


Gambit