type
TfMain = class(TForm)
MainMenu1: TMainMenu;
Newchild1: TMenuItem;
Newchild2: TMenuItem;
procedure Newchild2Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
fMain: TfMain;
implementation
uses ChildForm;
{$R *.DFM}
procedure TfMain.Newchild2Click(Sender: TObject);
begin
with TfChild.Create(Application) do
Show();
end;
function ClientWindowProc( wnd: HWND; msg: Cardinal; wparam, lparam: Integer ): Integer; stdcall;
var
f: Pointer;
begin
f := Pointer( GetWindowLong( wnd, GWL_USERDATA ));
case msg of
WM_NCCALCSIZE:
if ( GetWindowLong( wnd, GWL_STYLE ) and
(WS_HSCROLL or WS_VSCROLL)) <> 0 then
SetWindowLong( wnd, GWL_STYLE, GetWindowLong( wnd, GWL_STYLE )
and not (WS_HSCROLL or WS_VSCROLL));
end;
Result := CallWindowProc( f, wnd, msg, wparam, lparam );
end;
procedure TfMain.FormCreate(Sender: TObject);
begin
if ClientHandle <> 0 then begin
if GetWindowLong( ClientHandle, GWL_USERDATA ) <> 0 then
Exit; {cannot subclass client window, userdata already in use}
SetWindowLong(ClientHandle, GWL_USERDATA, SetWindowLong( ClientHandle,
GWL_WNDPROC, integer( @ClientWindowProc)));
end;
end;
end.
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