Encoding error in CL_GUI_INPUT_FIELD

Hi folks,

since the SAP GUI 7.4 allows the usage of CL_GUI_INPUT_FIELD, I tried it out, but unfortunately there is some issue with the encoding I just can't get around.

lo_input->set_text(
     text = 'HELLO'
).

results in the following:

I guess that the HE and the LL are somehow combined to a single character each. Is there a way I have to convert my string before passing it to set_text?

Thanks in advance,

David