var DC : HDC;procedure TForm1.Button1MouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer); begin LineTo(DC, x, y); end;procedure TForm1.FormShow(Sender: TObject); begin DC := GetDC(Button1.Handle); end;
鼠标移动就有一条线在上面跟着走...... var DC : HDC;procedure TForm1.Button1MouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer); begin Button1.Refresh;//简单地使用Refresh吧 MoveToEx(DC, 0, 0, nil); LineTo(DC, x, y); end;procedure TForm1.FormShow(Sender: TObject); begin DC := GetDC(Button1.Handle); end;
TO lihuasoft(坐井观天) 能用其他方法代替Button1.Refresh吗?最好是释放了LINE的对象。而且我还想把线的样式设置为虚线呢?请问方法是什么呢??在线等解决了再加分!
DC : HDC;procedure TForm1.Button1MouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Integer);
begin
LineTo(DC, x, y);
end;procedure TForm1.FormShow(Sender: TObject);
begin
DC := GetDC(Button1.Handle);
end;
var
DC : HDC;procedure TForm1.Button1MouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Integer);
begin
Button1.Refresh;//简单地使用Refresh吧
MoveToEx(DC, 0, 0, nil);
LineTo(DC, x, y);
end;procedure TForm1.FormShow(Sender: TObject);
begin
DC := GetDC(Button1.Handle);
end;
能用其他方法代替Button1.Refresh吗?最好是释放了LINE的对象。而且我还想把线的样式设置为虚线呢?请问方法是什么呢??在线等解决了再加分!
DC : HDC;
xOld, yOld : integer;procedure TForm1.Button1MouseMove(Sender: TObject; Shift: TShiftState; X,
Y: Integer);
begin
MoveToEx(DC, 0, 0, nil);
LineTo(DC, xOld, yOld);
MoveToEx(DC, 0, 0, nil);
LineTo(DC, x, y);
xOld := x;
yOld := y;
end;procedure TForm1.FormShow(Sender: TObject);
begin
DC := GetDC(Button1.Handle);
SetRop2(DC, R2_NOT);
end;
但效果并不是很好. 设置PenStyle是虚线的API函数, 我没找到. 既然已结贴,你就另开贴问别人吧. Sorry