WM_MOUSEWHEEL messages missing?

[kevindckr]

Hello, new to this forum.

My first question has to do with giving(forcing) a window focus, so that I can handle WM_MOUSEWHEEL messages.

I currently have a CGXGridWnd inside of a CDlgPage, im my gridwnd I have a messge handler that will receive WM_MOUSEWHEEL messages and scroll the list accordingly, this works fine until I click on of the four CxShadeButtons on the screen(CDlgPage) which takes focus from my gridwnd (i think), so then after the button is done doing what it does I cannot keep scrolling as I wish.

I came to this conclusion because I placed this code block inside two functions,

CWnd *pWnd = this->GetFocus();
	if(pWnd->GetSafeHwnd() != this->GetSafeHwnd())
		TRACE("NOT IN FOCUS\n");

I placed this inside my message handler inside the CGXGridWnd class, also in the function called when a button is pressed on the CDlgPage (on this page it is modified to find the Focus of my grid window, so read m_GridWnd. instead of this->)

So, when a button is pressed I get the TRACE statement, which means the grid is not in focus, and the call I make to GetFocus does not give the gridwnd focus.


So I guess my overall question is, first should I be forcing focus on the gridwnd for what I want to happen to happen, and if so how do I force focus on a window?



Thanks in advance,

Kevin

EDIT:

Just to add, When using Spy++ I could not find where AT ALL the WM_MOUSEWHEEL messages were being sent after a button is pressed. I was watching the GridWnd, the button, the CDlgPage, and the entire application window. I mean it to me looks like I don't even have a mousewheel. The messages only start to come up again after I physically use my mouse and click on something in the GridWnd.

Another EDIT:

In the function that is called on my CDlgPage when a button is pressed I put the line m_GridWnd.SendMessage(WM_PASTE, 0, 0) and try to paste nothing so I can get focus. This does not work either, it seems only a click will get focus to the list

EDIT 3:

If I place the following code into the CDlgPage function that is called when the button is pressed, placed right at the end of the function

CWnd *pWnd = GetFocus();
HWND hWnd = pWnd->GetSafeHwnd();
TRACE("Focus Wnd: %d\n", hWnd);

CWnd *ppWnd = GetForegroundWindow();
HWND hhWnd = ppWnd->GetSafeHwnd();
TRACE("Foreground Wnd: %d\n", hhWnd);

It says Focus Wnd: 0 Foreground Wnd: (the application)
but I place the same code block inside of my scroll message handler in the GridWnd class it actually says that the focus is on the grid control.

So by having a focus of 0 does that mean that I somehow trapped my focus as in this article
http://www.olivierlanglois.net/trapped_focus.html