// This example will show you a faster method how you can obtain
// the text of the specified window's title bar under Windows NT/2000 systems.
// (c)1999 Ashot Oganesyan K, SmartLine, Inc
// mailto:ashot@aha.ru, http://www.protect-me.com, http://www.codepile.com
// The function copies the text of the specified window's title bar
// (if it has one) into a buffer. The InternalGetWindowText function is
// much faster than the documented GetWindowText because it uses INT 2E interrupt
// NT-Specific!
// Here is the prototype for InternalGetWindowText:
(*
InternalGetWindowText(
hWnd: HWND; {a handle to a window or control with text}
lpString: PChar; {a pointer to a buffer to receive the string (UNICODE!!!)}
nMaxCount: Integer {the maximum number of characters to copy}
): Integer; {returns the length of the copied string}
*)
function NT_InternalGetWindowText(Wnd: HWND): string;
type
TInternalGetWindowText = function(Wnd: HWND; lpString: PWideChar;
nMaxCount: Integer): Integer;
stdcall;
var
hUserDll: THandle;
InternalGetWindowText: TInternalGetWindowText;
lpString: array[0..MAX_PATH] of WideChar; //Buffer for window caption
oemStr: PChar;
begin
Result := '';
hUserDll := GetModuleHandle('user32.dll');
if (hUserDll > 0) then
begin @InternalGetWindowText := GetProcAddress(hUserDll, 'InternalGetWindowText');
if Assigned(InternalGetWindowText) then
begin
InternalGetWindowText(Wnd, lpString, SizeOf(lpString));
Result := string(lpString);
end;
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
ShowMessage(NT_InternalGetWindowText(Form1.Handle));
end;