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copyr25 (2002-02-04 18:45) [3]

...
private
{ Private declarations }
protected
procedure RebuildWindowRgn;
procedure Resize; override;
public
constructor Create(AOwner: TComponent); override;
end;

var
Form1: TForm1;

implementation

{$R *.DFM}

constructor TForm1.Create(AOwner: TComponent);
begin
inherited;

RebuildWindowRgn;
end;
procedure TForm1.Resize;
begin
inherited;
RebuildWindowRgn;
end;
procedure TForm1.RebuildWindowRgn;
var
FullRgn, Rgn: THandle;
ClientX, ClientY, I: Integer;
begin
ClientX:= (Width - ClientWidth) div 2;
ClientY:= Height - ClientHeight - ClientX;
FullRgn:= CreateRectRgn(0, 0, Width, Height);
Rgn:= CreateRectRgn(ClientX, ClientY, ClientX + ClientWidth, ClientY +
ClientHeight);
CombineRgn(FullRgn, FullRgn, Rgn, rgn_Diff);
for I:= 0 to ControlCount -1 do
with Controls[I] do begin
Rgn:= CreateRectRgn(ClientX + Left, ClientY + Top, ClientX + Left +
Width, ClientY + Top + Height);
CombineRgn(FullRgn, FullRgn, Rgn, rgn_Or);
end;
SetWindowRgn(Handle, FullRgn, True);
end;

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