TSDIAppForm ?

TSDIAppForm is not a standard C++ Builder component (At least not in version 5 anyway).  I am guessing you are looking at an example where an new Application project has been created and the Name property of the main form has been set to TSDIAppForm.

You may need to post some more information if this is not the case.

Thanks, the following is SDIMain.cpp and I am in C++ Builder 6
I would like to create a TSDIAppForm as well ... could anyone please give me a hint about where to start it in C++Builder 6 IDE ??? thanks !

meow.
------------------------------------
#include <vcl.h>
#pragma hdrstop

#include "SDIMain.h"
#include "About.h"
//---------------------------------------------------------------------
#pragma resource "*.dfm"
TSDIAppForm *SDIAppForm;
//---------------------------------------------------------------------
__fastcall TSDIAppForm::TSDIAppForm(TComponent *AOwner)
      : TForm(AOwner)
{
}
//---------------------------------------------------------------------
void __fastcall TSDIAppForm::ShowHint(TObject *Sender)
{
      StatusBar->SimpleText = Application->Hint;
}
//---------------------------------------------------------------------
void __fastcall TSDIAppForm::ExitItemClick(TObject *Sender)
{
      Close();
}
//---------------------------------------------------------------------