void __fastcall TForm1::Button5Click(TObject *Sender)
{
   (TabControl1->TabWidth == 40)?TabControl1->TabWidth=0:TabControl1->TabWidth=40;
}

[C++ Error] Unit1.cpp(43): E2492 Properties may only be assigned using a simple statement, e.g. "prop = value;"
[C++ Error] Unit1.cpp(43): E2492 Properties may only be assigned using a simple statement, e.g. "prop = value;"
[C++ Error] Unit1.cpp(43): E2369 Cannot use the result of a property assignment as an rvalue

이런 error message가 떳는데요 어떤걸 의미하는지 모르겠습니다~
알려주세요^^;