To creation-zy：
procedure TMainForm.CreateWnd;
begin
inherited Createwnd;
FClientInstance := MakeObjectInstance(ClientWndProc);
FPrevClientProc := Pointer(GetWindowLong(ClientHandle, GWL_WNDPROC));
SetWindowLong(ClientHandle, GWL_WNDPROC, LongInt(FClientInstance));
end;
procedure TMainForm.ClientWndProc(var message:TMessage);
var
MyDC : hDC;
Ro, Co : Word;
begin
with Message do
case Msg of
WM_ERASEBKGND:
begin
MyDC := TWMEraseBkGnd(message).DC;
for Ro := 0 to ClientHeight div Bkbmp.Height do
for Co := 0 to ClientWIDTH div Bkbmp.Width do
BitBlt(MyDC, Co*Bkbmp.Width, Ro*Bkbmp.Height,
Bkbmp.Width, Bkbmp.Height,
Bkbmp.Canvas.Handle, 0, 0, SRCCOPY);
Result := 1;
end;
else
Result := CallWindowProc(FPrevClientProc, ClientHandle, Msg, wParam, lParam);
end;
end;
To MrMengyi：
那你能告诉我替代它的语句吗？
