Mega Code Archive
Limit a forms movement to the workarea
<![CDATA[
// For some reason messages.pas declares no message record for this message
type
TWmMoving = record
Msg: Cardinal;
fwSide: Cardinal;
lpRect: PRect;
Result: Integer;
end;
// Add a handler to your forms private section:
procedure WMMoving(var msg: TWMMoving); message WM_MOVING;
// Implement it as
procedure TFormX.WMMoving(var msg: TWMMoving);
var
r: TRect;
begin
r := Screen.WorkareaRect;
// compare the new form bounds in msg.lpRect^ with r and modify it if
// necessary
if msg.lprect^.left < r.left then
OffsetRect(msg.lprect^, r.left - msg.lprect^.left, 0);
if msg.lprect^.top < r.top then
OffsetRect(msg.lprect^, 0, r.top - msg.lprect^.top);
if msg.lprect^.right > r.right then
OffsetRect(msg.lprect^, r.right - msg.lprect^.right, 0);
if msg.lprect^.bottom > r.bottom then
OffsetRect(msg.lprect^, 0, r.bottom - msg.lprect^.bottom);
inherited;
end;
]]>