Заполнение изображением MDI-формы IV

Nomadic советует:

Я делал так:

type
.... =class(TForm)
....
procedure FormCreate(Sender:TObject);
procedure FormDestroy(Sender:TObject);
....
private
FHBrush:HBRUSH;
FCover:TBitmap;

FNewClientInstance:TFarProc;
FOldClientInstance:TFarProc;
procedure NewClientWndProc(var Message:TMessage);
....
protected
....
procedure CreateWnd;override;
....
end;

.....

implementation

{$R myRes.res} //pесуpс с битмапом фона

procedure .FormCreate(...);
var
LogBrush:TLogbrush;
begin
FCover:=TBitmap.Create;
FCover.LoadFromResourceName(hinstance,'BMPCOVER');
With LogBrush do
begin
lbStyle:=BS_PATTERN;
lbHatch:=FCover.Handle;
end;
FHBrush:=CreateBrushIndirect(Logbrush);
end;

procedure .FormDestroy(...);
begin
DeleteObject(FHBrush);
FCover.Free;
end;

procedure .CreateWnd;
begin
inherited CreateWnd;
if (ClientHandle <> 0) then
begin
if NewStyleControls then
SetWindowLong(ClientHandle, GWL_EXSTYLE, WS_EX_CLIENTEDGE or
GetWindowLong(ClientHandle, GWL_EXSTYLE));

FNewClientInstance:=MakeObjectInstance(NewClientWndProc);
FOldClientInstance:=pointer(GetWindowLong(ClientHandle,GWL_WNDPROC));
SetWindowLong(ClientHandle,GWL_WNDPROC,longint(FNewClientInstance));
end;
end;

procedure .NewClientWndProc(var Message:TMessage);

procedure Default;
begin
with Message do
Result := CallWindowProc(FOldClientInstance, ClientHandle, Msg, wParam,
lParam);
end;

begin
with Message do
begin
case Msg of
WM_ERASEBKGND:
begin
FillRect(TWMEraseBkGnd(Message).DC, ClientRect,FHBrush);
Result := 1;
end;
else
Default;
end;
end;
end;

[001228]

Содержание раздела