Delphi中绘制圆角矩形的窗体

制作圆角矩形的窗体：

01.procedure TPortForm.FormCreate(Sender: Tobject);

02.var hr :thandle;

03.begin

04.hr:=createroundrectrgn(0,0,width,height,20,20);

05.setwindowrgn(handle,hr,true); 

06.end;

如果不要窗体外框，则使用：

procedure TPortForm.FormCreate(Sender: Tobject);

var hr :thandle;

begin

hr:=createroundrectrgn(1,1,width-2,height-2,20,20);

setwindowrgn(handle,hr,true); 

end;

由于第一段代码做出来的窗口，圆角部份会没有边框，使用下面的代码做出边框：

01.procedure TForm1.FormPaint(Sender: TObject);

02.var

03.DC: HDC;

04.Pen: HPen;

05.OldPen: HPen;

06.OldBrush: HBrush;

07.begin

08.DC := GetWindowDC(Handle);

09.Pen := CreatePen(PS_SOLID, 1, clGray);

10.OldPen := SelectObject(DC, Pen); //载入自定义的画笔,保存原画笔

11.OldBrush := SelectObject(DC, GetStockObject(NULL_BRUSH));//载入空画刷,保存原画刷

12.RoundRect(DC, 0, 0, Width-1, Height-1,21,21); //画边框

13.SelectObject(DC,OldBrush);//载入原画刷

14.SelectObject(DC,OldPen); // 载入原画笔

15.DeleteObject(Pen);

16.ReleaseDC(Handle, DC);

17.end;