如何捕获窗体获得焦点和失去焦点的消息? ( 积分: 50 )

https://wedelphi.com/t/269743/

private
procedure CMGOTFOCUS(var Message: TMessage); message CM_GOTFOCUS;
procedure CMLOSTFOCUS(var Message: TMessage); message CM_LOSTFOCUS;
procedure CMACTIVATE(var Message: TMessage); message CM_ACTIVATE;
procedure CMDEACTIVATE(var Message: TMessage); message CM_DEACTIVATE;

 

查了以前的贴子,也亲自实验过,下面的代码确实可行!
unit Unit1;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs;
type
TForm1 = class(TForm)
private
{ Private declarations }
procedure WMACTIVATEAPP( var message:TWMACTIVATEAPP); message WM_ACTIVATEAPP;
public
{ Public declarations }
end;
var
Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.WMACTIVATEAPP(var message: TWMACTIVATEAPP);
begin
if Message.Active then
caption:='Form is Active'
else
caption:='Form is Not Active';
end;
end.

posted on   癫狂编程  阅读(353)  评论(0编辑  收藏  举报

导航

< 2025年1月 >
29 30 31 1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30 31 1
2 3 4 5 6 7 8
好的代码像粥一样,都是用时间熬出来的
点击右上角即可分享
微信分享提示