本例效果圖:
代碼文件:unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, ComCtrls;
type
TForm1 = class(TForm)
procedure FormPaint(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
uses GDIPOBJ, GDIPAPI;
procedure TForm1.FormPaint(Sender: TObject);
var
g: TGPGraphics;
b: TGPBrush;
rgn: TGPRegion;
RegionHandle: HRGN;
begin
g := TGPGraphics.Create(Canvas.Handle);
b := TGPHatchBrush.Create(HatchStyleDiagonalCross, aclSilver, aclLemonChiffon);
rgn := TGPRegion.Create(MakeRect(40.0, 40, ClientWidth-80, ClientHeight-80));
g.FillRegion(b, rgn);
RegionHandle := rgn.GetHRGN(g);
Canvas.Brush.Color := clRed;
FrameRgn(Canvas.Handle, RegionHandle, Canvas.Brush.Handle, 2, 2);
DeleteObject(RegionHandle);
rgn.Free;
b.Free;
g.Free;
end;
end.
窗體文件:object Form1: TForm1
Left = 0
Top = 0
Caption = 'Form1'
ClientHeight = 162
ClientWidth = 197
Color = clBtnFace
Font.Charset = DEFAULT_CHARSET
Font.Color = clWindowText
Font.Height = -11
Font.Name = 'Tahoma'
Font.Style = []
OldCreateOrder = False
Position = poDesktopCenter
OnPaint = FormPaint
PixelsPerInch = 96
TextHeight = 13
end
