Win11 22H2 (10.0.22621) can't support TB_BUTTONCOUNT message of System Toolbar

Question

TB_BUTTONCOUNT message can't get system tray icon's count any more after Win11 22H2 (10.0.22621).

https://learn.microsoft.com/en-us/windows/win32/controls/tb-buttoncount

The following code can get system tray icon's information in the Win10 system, and the following code is invalid after upgrading to 22621, that always get 0.

Is there a new method or API that can get system tray icon's information after Win11 22621?

HWND m_HWND = ::FindWindow(_T("Shell_TrayWnd"), NULL);
if (m_HWND != NULL) m_HWND = ::FindWindowEx(m_HWND, NULL, _T("TrayNotifyWnd"), NULL);  
if (m_HWND != NULL) m_HWND = ::FindWindowEx(m_HWND, NULL, _T("SysPager"), NULL); 
if (m_HWND != NULL) m_HWND = ::FindWindowEx(m_HWND, NULL, _T("ToolbarWindow32"), NULL); LRESULT nTrayCount = ::SendMessageW(m_HWND, TB_BUTTONCOUNT, 0, 0);

Answer 1

I don't have Windows 11, but it could work with UI Automation, like in this test ; https://learn.microsoft.com/en-us/answers/questions/115440/how-to-find-taskbar-button-screen-rect-of-a-window

(maybe by changing the FindWindowEx calls, if the hierarchy has changed (check with Inspect tool))

Answer 2

I'm having the same issue in windows 11 23H2