Thank You dee-u,
exactly what i want

one more question
can you explain me exactly what happen to the window when you install the WS_EX_TRANSPRENT? Coz i wonder y the form does not become fully transprent after installing this style.

Code:
        SetWindowLong Frm.hWnd, GWL_EXSTYLE, GetWindowLong(Frm.hWnd, GWL_EXSTYLE) Or WS_EX_TRANSPARENT