Why doesn't my context menu dismiss properly when I click elsewhere?

This is a known problem with TrackPopupMenu. The cure is simple, though somewhat obscure. Immediately before you call TrackPopupMenu, make a call to SetForegroundWindow for your menu's owner window. Then immediately after the call to TrackPopupMenu, post the same window a WM_NULL message. Bizarre, but it works. Look at this sample code:

HMENU hQuick = ::GetSubMenu (m_hUtility, IDM_QUICK);
POINT CurPos ;
GetCursorPos (&CurPos);

SetForegroundWindow (); // Bodge

TrackPopupMenu (hQuick,
TPM_LEFTBUTTON,
CurPos.x,
CurPos.y,
0,
GetSafeHwnd(),
NULL);

PostMessage (WM_NULL, 0, 0); // Bodge

Author : Bob Moore