焦点问题

[xiaoli2200]

我想实现这样一个东东
比如shape控件，我想把鼠标移上去时就变色，移开时恢复，原来我是在MOUSEMOVE中做的，移开时在别的控件写，把它变回来，但有缺陷，因为移到FORM外就不行了，请问有什么好方法，谢谢

[herofy]

我只知道用消息

[Alanwn]

用图片试试好不

[xiaoli2200]

意思是这样，怎么样得到光标在某个控件上，或者怎么样得到光标已经离开这个控件

[gx]

gz

[zzh54zzh]

先看看这个
unit Unit1;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, ExtCtrls, StdCtrls;

type
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
Type
TShape1 =class (TShape)
private
procedure CMMouseEnter(var Message: TMessage); message CM_MOUSEENTER;
procedure CMMouseLeave(var Message: TMessage); message CM_MOUSELEAVE;
end;

var
Form1: TForm1;
Shape1: TShape1;
implementation

{$R *.dfm}

{ TShape1 }

procedure TShape1.CMMouseEnter(var Message: TMessage);
begin
Form1.Caption := 'Y';
end;

procedure TShape1.CMMouseLeave(var Message: TMessage);
begin
Form1.Caption := 'N';
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
Shape1 := TShape1.Create(Form1);
Shape1.Parent := Form1;
Shape1.Align := alClient;
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
Shape1.Free;
end;

end.

[zzh54zzh]

这个方法可能有些笨，不过我测试过了，符合你的要求：
unit Unit1;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, ExtCtrls, StdCtrls;

type
TForm1 = class(TForm)
Timer1: TTimer;
Timer2: TTimer;
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
procedure Timer1Timer(Sender: TObject);
procedure Timer2Timer(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
Type
TShape1 =class (TShape)
private
procedure CMMouseEnter(var Message: TMessage); message CM_MOUSEENTER;
procedure CMMouseLeave(var Message: TMessage); message CM_MOUSELEAVE;
end;

var
Form1: TForm1;
Shape1: TShape1;

implementation

{$R *.dfm}

{ TShape1 }

procedure TShape1.CMMouseEnter(var Message: TMessage);
begin
Form1.Timer1.Enabled := True;
Form1.Timer2.Enabled := False;
end;

procedure TShape1.CMMouseLeave(var Message: TMessage);
begin
Form1.Timer1.Enabled := False;
Form1.Timer2.Enabled := True;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
Shape1 := TShape1.Create(Form1);
Shape1.Parent := Form1;
Shape1.Align := alClient;
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
Shape1.Free;
end;

procedure TForm1.Timer1Timer(Sender: TObject);
begin
if Shape1.Pen.Style <> psSolid then
Shape1.Pen.Style := psSolid;
end;

procedure TForm1.Timer2Timer(Sender: TObject);
begin
if Shape1.Pen.Style <> psClear then
Shape1.Pen.Style := psClear;
end;

end.

[zhp97]

有一个苯办法，你取得该应用程序窗口在屏幕上的坐标，随时与鼠标即时坐标做比较，如果鼠标在窗口之外就恢复颜色啊！！！取屏幕坐标好象有现成函数可用，不必自己写。