GetMenuBarInfo: no result

Hi,

need to know the size of my menubar, but got a problem with GetMenuBarInfo:
after the function call MENUBARINFO.rcBar is not initialized, and the returncode = false.
The errorcode returnde by GetLastError = 0.

I think I'm using a wrong argument, but which one?

HWND hWnd = <handle of the TopWindow that owns the menuBar>
LONG lObject = OBJID_MENU
LONG lItem = 0
MENUBAR.cbSize = sizeof(MENUBAR)

What could be wrong? Do I have to use the windowhandle of the menuBar instead of the TopLevelWindow? And if so, how to get it?

Thanks in advance
Best regards
testalucida

What is MENUBAR?
Show your actual code.

sorry, should be: MENUBARINFO

static RECT & GetMenuBarSize( HWND owner, RECT & rect ) {
MENUBARINFO mbi;
mbi.cbSize = sizeof( MENUBARINFO );
bool bOk = GetMenuBarInfo( owner, OBJID_MENU, (LONG)0, &mbi ); //returns false

DWORD err = GetLastError(); // returns 0
rect = mbi.rcBar;
return rect;
}

Hm... A little strange function...
And how are you using it? And what is the value of HWND owner? How do you obtain it?

True, I tink getMenuBaMInfo has a null owner. set a brak point and see the value clear.