What's the best way do determine if an HWND represents a top-level window?

Question

Is it to check for the WS_CHILD bit:

    LONG style = GetWindowLong(hwnd, GWL_STYLE);
    int isTopLevel = !(style & WS_CHILD);

Or is there a better way?

Assume: Straight C calling only existing Windows API code.

Answer 1

• Way #1: Test hWnd==GetAncestor(hWnd,GA_ROOT)

• Way #2: Use IsTopLevelWindow (user32 Win7, undocumented)