how to find out name of web dynpro abap application at runtime

hi,

does anybody know how i can read out the currently used web dynpro application name at runtime ? is there any function module/method

for that ?

I have a user exit in travel management which is used by backend transaction and many web dynpro applications. i only want to run trough the coding of the user exit when the calling web dynpro application is a specific one, and NOT call the exit when it is called from backend/ or other web dynpro applications.

there is nothing like sy-tcode for name of current web dynpro application ?!?

somebody told me to use this:

data lv_name type string.

lv_name = cl_wdr_task=>application->name.

but when using this coding i get dump in ST22 with runtime error "OBJECTS_OBJREF_NOT_ASSIGNED".

br Martin