Thread: Problem with taskbar icon

This is my code:

Code:

#include <windows.h>
#define WM_TASKBAR 45154
#define IDI_ICON1 5001
/*  Declare Windows procedure  */
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);
HWND hwnd;
/*  Make the class name into a global variable  */
char szClassName[ ] = "WindowsApp";
LRESULT	TaskbarFunc(WPARAM wParam, LPARAM lParam);
void RemoveTask();
void CreateTask();
int WINAPI WinMain (HINSTANCE hThisInstance,
                    HINSTANCE hPrevInstance,
                    LPSTR lpszArgument,
                    int nFunsterStil)

{
    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, 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);
    }

    /* 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)
{
    switch (message)                  /* handle the messages */
    {
        case WM_CREATE:
            CreateTask();
            break;
        case WM_TASKBAR:{
            UINT uMouseMsg = (UINT) lParam;	
	        switch (uMouseMsg){
		        case WM_LBUTTONDOWN: MessageBox(HWND_DESKTOP,"Mouse click on the Icon !","WARNING",MB_OK);
					 break;
		        default: break;
	        }
            break;}
        case WM_DESTROY:
            RemoveTask();
            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;
}
void RemoveTask(){
	NOTIFYICONDATA tnid; 
    tnid.cbSize = sizeof(NOTIFYICONDATA); 
    tnid.hWnd = hwnd; 
	tnid.uID = IDI_ICON1;
	Shell_NotifyIcon(NIM_DELETE, &tnid); 	
}
void CreateTask(){
	HICON hIcon;
	char lpszTip[] = "Mouse is on the Icon !!";
	hIcon = (HICON)LoadImage(GetModuleHandle(NULL),MAKEINTRESOURCE(IDI_ICON1),IMAGE_ICON,16,16,LR_DEFAULTCOLOR);
	NOTIFYICONDATA tnid; 
    tnid.cbSize = sizeof(NOTIFYICONDATA); 
    tnid.hWnd = hwnd; 
    tnid.uID = IDI_ICON1; 
    tnid.uFlags = NIF_MESSAGE | NIF_ICON | NIF_TIP; 
    tnid.uCallbackMessage = WM_TASKBAR; // my user message 
    tnid.hIcon = hIcon; 	
	if (lpszTip){ lstrcpyn(tnid.szTip, lpszTip, sizeof(tnid.szTip));}
    else{ tnid.szTip[0] = '\0';}
	Shell_NotifyIcon(NIM_ADD, &tnid); 
	if (hIcon){ DestroyIcon(hIcon); }
}

This is what I've mixed up from different examples what were using AFX, were coded to be compatible with Visual C++ and don't work in normal compilers or used MFC instead of Win32.
My problem is that when I move my mouse to the icon, it just disappears. What mistakes have I made?

My resource.rc

Code:

5001               ICON    DISCARDABLE     "icon1.ico"