Controlling the timer is done with a control register, to see what the state is you better use ReadStatusRegister(). Take care, some of the status bits are clear-on-read, so there is no second chance ;-)
How could I see if Timer_1 is enabled or stop state ? Any code example ?
Indeed to see if the timer is software enabled you will need to read back the control register.
On Creator Start page you will see an entry "Find Code Example" there you will get timer examples.