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Getwindowtext does not retrieve text

I've tried the following code, but it doesn't fetch the text from the foreground window!

procedure TForm1.Button1Click(Sender: TObject);
 var
  title : pansichar;
  s : string;
begin
    GetWindowText(GetForegroundWindow(), title,GetWindowTextLength(GetForegroundWindow()) + 1);
    s := title;
    showmessage(s);
end;
+2


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5 answers


Use this:



var
  hwndForeground: HWND;
  titleLength: Integer;
  title: string;
begin
  hwndForeground := GetForegroundWindow();
  titleLength := GetWindowTextLength(hwndForeground);
  SetLength(title, titleLength);
  GetWindowText(hwndForeground, PChar(title), titleLength + 1);
  title := PChar(title);

  ShowMessage(title);
end;
+9


source


Replace this line:

  title : pansichar;


with this:

  title: array[0..255] of Char;
+3


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Try this code

procedure TForm1.Button1Click(Sender: TObject);
 var
  title : array[0..254] of Char;
  s : string;
begin
    GetWindowText(GetForegroundWindow(), title,255);
    s := title;
    showmessage(s);
end;

Bye.

+2


source 


procedure TForm1.Button1Click (Sender: TObject);
var
  liHwnd, liLength: Integer;
  lpChar: PChar;
begin
  liHwnd: = GetForegroundWindow ();
  liLength: = GetWindowTextLength (liHwnd) + 1;
  lpChar: = StrAlloc (liLength);
  Try
    GetWindowText (liHwnd, lpChar, liLength);

    showmessage (lpChar);
  Finally
    StrDispose (lpChar);
  End;
end;
+1


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