Removing window border?

Question

I have a window with a solid border around it. How can I remove the border (all of the non-client area) by using SetWindowLong and GetWindowLong

Answer 1

The following Delphi codes does it:

  SetWindowLong(Handle, GWL_STYLE, GetWindowLong(Handle, GWL_STYLE) and not WS_BORDER and not WS_SIZEBOX and not WS_DLGFRAME );
  SetWindowPos(Handle, HWND_TOP, Left, Top, Width, Height, SWP_FRAMECHANGED);

Of course, these API calls look the same in all languages.