Нажатие на иконку в трее

#include <windows.h>
 
/*  Declare Windows procedure  */
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);
 
/*  Make the class name into a global variable  */
char szClassName[ ] = "WindowsApp";
HINSTANCE hInst;
int WINAPI WinMain (HINSTANCE hThisInstance,
                    HINSTANCE hPrevInstance,
                    LPSTR lpszArgument,
                    int nFunsterStil)
 
{
    HWND hwnd;               /* This is the handle for our window */
    MSG messages;            /* Here messages to the application are saved */
    WNDCLASSEX wincl;        /* Data structure for the windowclass */
 
    /* The Window structure */
    wincl.hInstance = hThisInstance;
    wincl.lpszClassName = szClassName;
    wincl.lpfnWndProc = WindowProcedure;      /* This function is called by windows */
    wincl.style = CS_DBLCLKS;                 /* Catch double-clicks */
    wincl.cbSize = sizeof (WNDCLASSEX);
 
    /* Use default icon and mouse-pointer */
    wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
    wincl.lpszMenuName = NULL;                 /* No menu */
    wincl.cbClsExtra = 0;                      /* No extra bytes after the window class */
    wincl.cbWndExtra = 0;                      /* structure or the window instance */
    /* Use Windows's default color as the background of the window */
    wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;
 
    /* Register the window class, and if it fails quit the program */
    if (!RegisterClassEx (&wincl))
        return 0;
 
    /* The class is registered, let's create the program*/
    hwnd = CreateWindowEx (
           0,                   /* Extended possibilites for variation */
           szClassName,         /* Classname */
           "Windows App",       /* 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, SW_HIDE);
SetWindowLong(hwnd, GWL_EXSTYLE, GetWindowLong(hwnd, GWL_EXSTYLE) | WS_EX_TOOLWINDOW);
ShowWindow(hwnd,SW_SHOW);
 
    /* 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);
    }
 
    /* The program return-value is 0 - The value that PostQuitMessage() gave */
    return messages.wParam;
}
 
 
/*  This function is called by the Windows function DispatchMessage()  */
 
LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{char szText[100];
HICON hIco;
BOOL TrayMessage(HWND,DWORD,UINT,HICON,PSTR);
   hIco=LoadIcon(hInst,IDI_ASTERISK);
 
    switch (message)                  /* handle the messages */
    {
case WM_CREATE:
   lstrcpy(szText,"Ïðèâåò"); // ïîäñêàçêà
   TrayMessage(hwnd,NIM_ADD,0,hIco,szText); // NIM_ADD äîáàâèòü èêîíêó â òðåé
  break;
case WM_LBUTTONUP:
     Beep(550,500);
     break;
        case WM_DESTROY:
            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;
}
BOOL TrayMessage(HWND hwn,DWORD dwMsg,UINT uID,HICON hIcon,PSTR pszTip) 
 { 
 BOOL rezt; 
 NOTIFYICONDATA nid; 
 nid.cbSize = sizeof(NOTIFYICONDATA); 
 nid.hWnd = hwn; 
 nid.uID = uID; 
 nid.uFlags = NIF_MESSAGE | NIF_ICON | NIF_TIP;
 nid.hIcon = hIcon; 
    if (pszTip) 
    { 
     lstrcpyn(nid.szTip, pszTip, sizeof(nid.szTip)); 
    } 
    else 
    { 
     nid.szTip[0] = '\0'; 
    } 
    rezt = Shell_NotifyIcon(dwMsg, &nid); 
    return rezt; 
 }

if(message == MYWM_NOTIFYICON && lParam == WM_LBUTTONDOWN)
    {
        if (iTray==0)
        {
                          // скрыть окно при нажатии на иконку
            ShowWindow(hWnd,SW_HIDE);
            iTray=1;
        }
        else
        {
                              // показать окно при нажатии на иконку
            ShowWindow(hWnd,SW_SHOW);
            iTray=0;
        }