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.
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