(C++ Builder) Setting NDEBUG

• Click ' (menu) Project | (menu item) Options | (tab) Directories/Conditionals'
• Click on the ellipsis (...) button right of 'Conditional defines'
• In the edit box, type NDEBUG
• Click the button 'Add'

__fastcall TForm1::TForm1(TComponent* Owner)
  : TForm(Owner)
{
ifndef NDEBUG

    this->Caption += " - Debug version";
else

    this->Caption += " - NoDebug version";
endif

}