When working with 4D Transformation Tags it is advised to append the 4D command number to the command name in fhe form of "String:C10(...)."

There is not command to return the command number for a 4D command. There are two places where the command number can be easily found. It is displayed in the upper right coner in the online documentation page on docs.4d.com as shown in the image below on the left. It is also availablem in the 4D Explorer under the Commands tab for a command in the documention text as shown in the image on the right below.