> Hi,

> I have a problem with OOP.

> Okay, let me explain what I am trying to do.
> I have created a Base Class called, ChildForm and TxtChild is derived
> from ChildFrm as shown below:

> ChildForm header file:

> class TChildForm:public TForm
> {
>    public:
>       AnsiString Filename;
>       __fastcall ChildForm(TComponent* Owner, AnsiString s);
> };

> ChildForm implementation file:

> __fastcall TChildForm::TChildForm(TComponent* Owner, AnsiString s)
>         : TForm(Owner)
> {
>         Filename = s;
> }

> TxtChild header file:

> class TTextChild:public TChildForm
> {
>    public:
>      __fastcall TTextChild(TComponent* Owner);
> };

> When I compile the project, I got the following error:

> [C++ Error] TxtChild.cpp(16): E2285 Could not find a match for
> 'TChildForm::TChildForm(TComponent *)'

> Well, the error is quite obvious, because I have modified the default
> constructor by adding the extra AnsiString argument. Simple, all I need
> to do now is to add the same argument into TxtChild.cpp's default
> constructor and hope everything will work just fine......but that was
> not the case though :(

> Anyone could shed some light on this?
> Many thanks.

> --

> UK Time:

> --
> Quote: To Know The Road Ahead, Ask Those Who Had Returned.

> Michael

> class TTextChild:public TChildForm
> {
>    public:
>      __fastcall TTextChild(TComponent* Owner);
> };

> When I compile the project, I got the following error:

> [C++ Error] TxtChild.cpp(16): E2285 Could not find a match for
> 'TChildForm::TChildForm(TComponent *)'

> Mike <m...@uk.xyratex.com> writes:

> > class TChildForm:public TForm
> > {
> >    public:
> >       AnsiString Filename;
> >       __fastcall ChildForm(TComponent* Owner, AnsiString s);
> > };

> > class TTextChild:public TChildForm
> > {
> >    public:
> >      __fastcall TTextChild(TComponent* Owner);
> > };

> > When I compile the project, I got the following error:

> > [C++ Error] TxtChild.cpp(16): E2285 Could not find a match for
> > 'TChildForm::TChildForm(TComponent *)'

> You didn't post the implementation of the TTextChild constructor,
> which is where I'd assume the error is.  It must call the base class
> constructor in its initializer list, and it must pass in an Owner AND
> an AnsiString.  My guess is you're doing something like this:

> __fastcall TTextChild::TTextChild(TComponent* Owner)
>   : TChildForm(Owner)
> {
>   // whatever
> }

> But TChildForm takes an AnsiString, and you're calling it without
> passing in one.

> That's just my guess though, since I can't see the code that wasn't
> posted. :)

> HTH.

> --
> Chris (TeamB);