l'errore me lo da su returncodice:HWND getSystemTrayHwnd () { HWND hwndTray; //310 HWND hwndStartMenu = FindWindow ("ShellTrayWnd",NULL); HWND hwndChild = GetWindow (hwndStartMenu,GW_CHILD); int iClassName = 0; char szClass [255]; do { iClassName= GetClassName (hwndChild,szClass,sizeof(szClass)); //320 if (strstr(szClass,"TrayNotifyWnD")) { hwndTray = hwndChild; break; } else { hwndChild = GetWindow (hwndChild,GW_HWNDNEXT); }while (true); //330 } return hwndTray; }