Here is what Ive done in case someone searched for it .....
Form1->FormStyle = fsStayOnTop;
Form1->Width = Screen->Width;
Form1->Height = Screen->Height;
Form1->BorderStyle = bsNone;
Form1->Top = 0;
Form1->Left = 0;
//and to hide the taskbar "FindWindow gets the handle of the taskbar"
ShowWindow(FindWindow("Shell_TrayWnd", NULL), SW_HIDE);
//to show the taskbar again
ShowWindow(FindWindow("Shell_TrayWnd", NULL), SW_SHOW);