Modal window problem

duanya

A modal window is displayed on the interface. I want the modal window to flicker when the user clicks other parts except the modal window. I don't know how to do it, please give pointers !!!

贪财怕死爱瞌睡

unit1.h
// ------------------------------------------------ ---------------------------
class TfmFile: public TForm
{
__published: // IDE-managed Components
...
private: // User declarations
...
public: // User declarations
...
protected:
        void __fastcall CreateParams (Controls :: TCreateParams&Params);
};
// ------------------------------------------------ ---------------------------

    unit1.cpp
// ------------------------------------------------ ---------------------------
void __fastcall TfmFile :: CreateParams (Controls :: TCreateParams&Params)
{
  TForm :: CreateParams (Params);
  Params.WndParent = GetActiveWindow ();
}
// ------------------------------------------------ ---------------------------