I don't use DXLab. But have you ever tried it with SatPC32ISS? DXLab utilizes the SatPC32 DDE string. SatPC32ISS sends the same string (always or when the satellite is audible, takes that from SatPC32).  Create a new sub folder SatPC32ISS in the SatPC32 program folder. Copy the two sub folders Maps2D and BM-Maps2D and SatPC32ISS.exe from the main folder into the new  folder. Then rename SatPC32ISS.exe  to SatPC32.exe. You can start it with a shortcut on the desktop. It should then appear to DXLab exactly like the normal SatPC32.

73s,Erich, DK1TB