How to minimize a window to the system tray?

I am trying to build a simple window which, when minimized, will become an icon on the system tray, then can be activated again by clicking on that icon.  So far, using examples I have found, I have built a window that has an icon on the system tray, but the icon just disappears when I mouse over it.  I've made no progress on minimizing or activating. I am getting pretty stuck and not getting far :(   Any help is greatly appreciated..!

Here is the code for this simple window that I've been able to put together so far:


#include <windows.h>

#define MYICON 500


/* Declare Windows procedure */
LRESULT CALLBACK WindowProcedure(HWND, UINT, WPARAM, LPARAM);

/* Make the class name into a global variable */
char szClassName[ ] = "WindowsApp";

// FOR ADDING THE ICON TO THE STATUS BAR
NOTIFYICONDATA m_NotifyIconData;

// FOR NOTIFYING WINDOW FROM ICON
static UINT NEAR WM_YOURTRAYCALLBACKMESSAGE = RegisterWindowMessage("YourTrayCallbackMessage");


int WINAPI WinMain(HINSTANCE hThisInstance, HINSTANCE hPrevInstance, LPSTR lpszArgument, int nFunsterStil)

{
    HWND hwnd;
    MSG messages;
    WNDCLASSEX wincl;

    // THE WINDOW
    wincl.hInstance = hThisInstance;
    wincl.lpszClassName = szClassName;
    wincl.lpfnWndProc = WindowProcedure;
    wincl.style = CS_DBLCLKS;
    wincl.cbSize = sizeof(WNDCLASSEX);
    // USE MY OWN ICON
    wincl.hIcon  = LoadIcon(GetModuleHandle(NULL), MAKEINTRESOURCE(MYICON));
    wincl.hIconSm = NULL;

    wincl.hCursor = LoadCursor(NULL, IDC_ARROW);
    wincl.lpszMenuName = NULL; /* No menu */
    wincl.cbClsExtra = 0;
    wincl.cbWndExtra = 0;
    wincl.hbrBackground = (HBRUSH) GetStockObject(LTGRAY_BRUSH);

      // THIS ADDS THE ICON TO THE STATUS BAR
      m_NotifyIconData.cbSize = sizeof m_NotifyIconData;
      m_NotifyIconData.hWnd = hwnd;
      m_NotifyIconData.uID = 1;
      m_NotifyIconData.uFlags = NIF_ICON|NIF_TIP;
      m_NotifyIconData.hIcon = LoadIcon(GetModuleHandle(NULL), MAKEINTRESOURCE(MYICON));
      strcpy(m_NotifyIconData.szTip, "My Program");
      Shell_NotifyIcon(NIM_ADD, &m_NotifyIconData);

      // THIS IS SUPPOSED TO LET THE ICON OPEN THE WINDOW BACK UP
      m_NotifyIconData.uFlags = NIF_ICON|NIF_TIP|NIF_MESSAGE;
      m_NotifyIconData.uCallbackMessage = WM_YOURTRAYCALLBACKMESSAGE;

    // REGISTER WINDOW CLASS
    if(!RegisterClassEx(&wincl)) return 0;

    // CREATE PROGRAM
    hwnd = CreateWindowEx(
           0,                   /* Extended possibilites for variation */
           szClassName,         /* Classname */
           "Rustys Program",         /* Title Text */
           WS_OVERLAPPEDWINDOW, /* default window */
           CW_USEDEFAULT,       /* Windows decides the position */
           CW_USEDEFAULT,       /* where the window ends up on the screen */
           544,                 /* The programs width */
           375,                 /* and height in pixels */
           HWND_DESKTOP,        /* The window is a child-window to desktop */
           NULL,                /* No menu */
           hThisInstance,       /* Program Instance handler */
           NULL                 /* No Window Creation data */
           );

    /* Make the window visible on the screen */
    ShowWindow(hwnd, nFunsterStil);


    /* Run the message loop. It will run until GetMessage( ) returns 0 */
    while(GetMessage(&messages, NULL, 0, 0))
    {
           /* Translate virtual-key messages into character messages */
           TranslateMessage(&messages);

           /* Send message to WindowProcedure */
           DispatchMessage(&messages);
    }

    return messages.wParam;
}

/* This function is called by the Windows function DispatchMessage( ) */
LRESULT CALLBACK WindowProcedure(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)                  /* handle the messages */
    {
      case WM_DESTROY:

            // this is supposed to take the icon out of the system tray when the window is closed
            m_NotifyIconData.uFlags = 0;
            Shell_NotifyIcon(NIM_DELETE, &m_NotifyIconData);

            PostQuitMessage(0);        /* send a WM_QUIT to the message queue */
            break;
      default:                   /* for messages that we don't deal with */
            return DefWindowProc(hwnd, message, wParam, lParam);
    }
    return 0;
}