...
 if Visible or not Enabled or (fsModal in FFormState) or
    (FormStyle = fsMDIChild) then
    raise EInvalidOperation.Create(SCannotShowModal);
...

Calling ShowModal causes the exception to be raised, i.e. the logical
statement seems to return false.

Test:
Before calling ShowModal in c++ a similar construction evaluates
true:

   TMyForm* frm;
    bool result;
    frm = new TMyForme(Application);
   TFormState fst = frm->FormState;
    TFormStyle frmst = frm->FormStyle;
    if (        (frm->Visible) ||
                (!frm->Enabled) ||
                (frm->FormState.Contains(fsModal)) ||
                (frmst == fsMDIChild)
    ) result = false;
    else
      result = true;

   frm->ShowModal(); // Will often return with exception raised, but not always.

Question:
Is there a known problem in calling the VCL?
I just converted from CBuilder4 to CBuilder5.

Thanks for any response...

- Udo

I forgot :

the code is contained in a DLL which is exceuted via BC5.02 OWL app.

- Udo

Tom Byars schrieb:

Udo