MfG Herbert

http://www.winapi.net/index.php?inhalt=downloads

gibt es ein Programm namens Thumbnail, in dem auch ein Symbol neben der Uhr vorkommt.
Vielleicht hilft es dir ja weiter.

Aber das wärn Fall für die FAQ (falls es nicht schon dadrin is...)

Dafür müsste hier jemand mal nen ganz sauber und schön erklärten Code reinsetzen...

LRESULT CALLBACK AppWndProc(HWND hwnd, UINT uiMsg, WPARAM wParam, LPARAM lParam)
{
   static CTrayIcon* TrayIcon;

   switch(uiMsg)
   {
      case WM_CREATE:
         // Create the tray icon
         TrayIcon = new CTrayIcon(((LPCREATESTRUCT)lParam)->hInstance,
                                  hwnd,
                                  ID_ICO_MYICON, // Die in der Resource definierte Konstante für das Icon
                                  TEXT("My Tool Tip Text")
                                 );
         // Set a new popup menu
         TrayIcon->SetPopupMenu(ID_MENU, 0);
         return 0;

      case WM_COMMAND:
         switch(LOWORD(wParam))  // Switch between control IDs
         {
            // The menu item "Show" was clicked
            case ID_MI_SHOW:
               SendMessage(hwnd, WM_SYSCOMMAND, SC_RESTORE, 0);
               break;

            // The menu item "Show Balloon" was clicked
            case ID_MI_SHOWBALLOON:
               TrayIcon->ShowBalloon(TEXT("BalloonTitle"), TEXT("BalloonInfo"), 2000, NIIF_USER);
               break;

            // The menu item "Exit" was clicked
            case ID_MI_EXIT:
               SendMessage(hwnd, WM_CLOSE, 0, 0);
               break;
         }
         return 0;

      case WM_SYSCOMMAND:
         if(wParam == SC_MINIMIZE)     // The main window shall be minimized
         {
            TrayIcon->Show();          // Show the tray icon
            ShowWindow(hwnd, SW_HIDE); // Hide the main window
            return 0;
         }
         if(wParam == SC_RESTORE)      // The main window shall be restored
         {
            TrayIcon->Hide();          // Hide the tray icon
            SetForegroundWindow(hwnd); // Show main window and put it on the top of the Z order
         }
         break;

      // A mouse action was performed over the tray icon
      case WM_TRAYMESSAGE:
         if(lParam == WM_LBUTTONUP)    // The tray icon was leftclicked
            SendMessage(hwnd, WM_SYSCOMMAND, SC_RESTORE, 0);
         return 0;

      case WM_DESTROY:
         delete TrayIcon;
         PostQuitMessage(0);
         return 0;
   }

   return DefWindowProc(hwnd, uiMsg, wParam, lParam);
}