Access a Listbox

[cornholio]

Hello,
i have this little problem.
In my code, i create a listbox, which is a child window from the main window.
Now, the problem is: how can i access the listbox in the MainWindowProc function?

How can i set a ID to the ListBox, which will be passed as a message to the WindowProc?

I would be very thankful if you could give me a short example, because i really have no idea how this works.

Thank you very mutch.

[anonytmouse]

When creating a child window, you can use the hMenu argument as a child window identifier. This example uses the identifier 0xED. In real code, you should use a constant, rather than a magic number.

			CreateWindowEx(WS_EX_CLIENTEDGE, TEXT("EDIT"), TEXT("Write here!"), WS_CHILD | WS_VISIBLE,
			               0, 0, 0, 0,
			               hwnd, (HMENU) 0xED, GetModuleHandle(NULL), NULL);

Once, you have a child window with an identifier, you can use the SendDlgItemMessage, GetDlgItemText and SetDlgItemText functions to interact with it:

SetDlgItemText(hwnd, 0xED, TEXT("Hello"));

Alternatively, if you need its HWND, you can use the GetDlgItem function:

MoveWindow(GetDlgItem(hwnd, 0xED), rc.left, rc.top, rc.right, rc.bottom, TRUE);

The alternative method to interact with a child window is to store its HWND when you create it. However, using an identifier is generally preferable.