Mega Code Archive
How to recognize a applications is frozen or not responding
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unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
function AppFrozen(H: HWND) : Boolean;
var
dwResult: DWord;
const
timeout = 3000; // ms
begin
AppFrozen := SendMessageTimeout(H, WM_NULL, 0, 0,
SMTO_ABORTIFHUNG or SMTO_BLOCK,
timeout, dwResult) <> 0
end;
procedure TForm1.Button1Click(Sender: TObject);
var
H: HWND;
begin
H := FindWindow(nil, 'Name of Application');
if H<>0 then
if AppFrozen(H) then
ShowMessage('This Application is Frozen!');
end;
end.
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