CStatic not receiving WM_CTLCOLOR - visual-c++

Question

I think I am missing something small here.
I am trying to make a class which inherits from CStatic with a transparent background. I have managed create an instance of the class and it is displayed in the parent CView. However when I add a OnCtlColor message handler going through the class view on Visual Studio to make the background transparent, it never fires.
Here is a code snippet:
Foo.h
class Foo: public CStatic
{
DECLARE_DYNAMIC(Foo)
public:
Foo();
virtual ~Foo();
virtual void CreateCtrl(CWnd * Parent, POINT TopLeft, SIZE sz);
protected:
DECLARE_MESSAGE_MAP()
public:
afx_msg HBRUSH CtlColor(CDC* pDC, UINT nCtlColor);
afx_msg BOOL OnEraseBkgnd(CDC* pDC);
};
Foo.cpp
void Foo::CreateCtrl(CWnd * Parent, POINT TopLeft, SIZE sz)
{
CRect Rect(TopLeft, sz);
Create(pItem->Value->GetBuffer(), WS_CHILD | WS_VISIBLE | SS_CENTER | SS_NOTIFY, Rect, Parent);
ShowWindow(SW_SHOW);
}
BEGIN_MESSAGE_MAP(Foo, CStatic)
ON_WM_CTLCOLOR_REFLECT()
ON_WM_ERASEBKGND()
END_MESSAGE_MAP()
HBRUSH Foo::CtlColor(CDC* pDC, UINT nCtlColor)
{
pDC->SetBkMode(TRANSPARENT);
return (HBRUSH)GetStockObject(NULL_BRUSH);
}
BOOL Foo::OnEraseBkgnd(CDC* pDC)
{
return FALSE;
}
Can anyone suggest what I might be doing wrong?

Answer 1

WM_CTLCOLOR is sent to the parent window, not to the static control.
To catch the message in the static control class, you need to use ON_WM_CTLCOLOR_REFLECT in your message map, see MSDN Docs and use HBRUSH Foo::CtlColor(CDC* pDC, UINT nCtlColor).