use of HAL_SPI_Transmit()

I am using HAL_SPI_Transmit() API to write to slave's register, how can I confirm that it has actually find the right register and write to it? is below code right?

uint8_t R44=0x2C; //register address

uint8_t R44_data[2]={0x00,0x00};// data to be written

HAL_GPIO_WritePin(GPIOF, GPIO_PIN_12, GPIO_PIN_RESET);//CS pin low

 HAL_SPI_Transmit(&hspi1, (uint8_t *)&R44, 1, 100); // transmit address

 HAL_SPI_Transmit(&hspi1, (uint8_t *)R44_data, 2, 100);//transmit data

 HAL_GPIO_WritePin(GPIOF, GPIO_PIN_12, GPIO_PIN_SET);//CS pin high