Thread: LBN_SELCHANGE not working

I have a listbox that I just made, and I enumerated it with some values just to test it out. When the WM_COMMAND message occurs, I check if the listbox sent it, and then check if the LBN_SELCHANGE message has occured. Through testing, I have found that it does get whether the listbox sent the message, but it isn't detecting the LBN_SELCHANGE message has occured. Here is the portion of code that isn't working properly from within the WndProc.

Code:

case WM_CREATE:
		{
			HWND list = CreateWindowEx(0, "Listbox", "", WS_CHILD | WS_VISIBLE | WS_BORDER | WS_VSCROLL,
								0, 0, 50, 100, hwnd, (HMENU)EXTENSION_LIST,
								GetModuleHandle(NULL), NULL);
			SendMessage(list,(UINT)WM_SETFONT,(WPARAM)GetStockObject(DEFAULT_GUI_FONT),(LPARAM)MAKELPARAM(FALSE,0));
			for (int i=0;i<20;i++)
			{
				char buf[100];
				itoa(i, buf, 10);
				SendMessage(list,(UINT)LB_ADDSTRING,(WPARAM)0,(LPARAM)buf);
			}
		}
		break;
		
		case WM_COMMAND:
			switch(LOWORD(wParam))
			{
				case UPDATE_REGISTRY:
					updateRegistry();
				break;
				case EXTENSION_LIST:
					switch(HIWORD(wParam))
					{
						case LBN_SELCHANGE:
							MessageBox(NULL, "A Selection Was Chosen", "Chosen", MB_OK | MB_ICONEXCLAMATION);
						break;
					}
				break;
			}
		break;

Any ideas why I'm not catching the LBN_SELCHANGE message??? Thanks in advance.

Thanks for the help, but I still get nothing even with everything braced and returning zero... Any other ideas?? Might it be in the creation of the list??

Never mind, I missed the second line of your post. That fixed it. I can't believe I left that out. Thanks for your help!!!!!!

Oh, that wasn't in the original post?? That might be why I missed it.. Thank you very much!