Hi Digi,
The flashing display problem has been solved with the TEST and TEST2 versions you sent me by private mail. Thank you.
However, on my dell latitude e6500 system, I get a trap when I want to display the "MOUSE_0 IBM Compatible Mouse" properties.
Sometimes I can see it shortly, so a took a snapshot of it, but I think the problem has to do with "Unknown Mouse Adapter".    
02-10-2020  14:31:37  SYS3175  PID 005e  TID 0020  Slot 006a
H:\OS2\PMSHELL.EXE
c0000005
1d23b05f
P1=00000002  P2=980f7208  P3=XXXXXXXX  P4=XXXXXXXX
EAX=00e33770  EBX=980f7200  ECX=00e33bf0  EDX=720f56e4
ESI=00e30020  EDI=00e30000
DS=0053  DSACC=d0f3  DSLIM=bfffffff
ES=0053  ESACC=d0f3  ESLIM=bfffffff
FS=150b  FSACC=00f3  FSLIM=00000030
GS=0000  GSACC=****  GSLIM=********
CS:EIP=005b:1d23b05f  CSACC=d0df  CSLIM=bfffffff
SS:ESP=0053:00ea9d70  SSACC=d0f3  SSLIM=bfffffff
EBP=00000000  FLG=00010202
HWEXP.DLL 0002:0000b05f
------------------------------------------------------------
02-10-2020  14:31:37  SYS3170  PID 005e  TID 0001  Slot 0048
H:\OS2\PMSHELL.EXE
00000000
00000001
EAX=00e33770  EBX=00e30000  ECX=00e30030  EDX=980f7200
ESI=00e30000  EDI=00000000
DS=0053  DSACC=d0f3  DSLIM=bfffffff
ES=0053  ESACC=d0f3  ESLIM=bfffffff
FS=150b  FSACC=00f3  FSLIM=00000030
GS=0000  GSACC=****  GSLIM=********
CS:EIP=005b:1d23b0e3  CSACC=d0df  CSLIM=bfffffff
SS:ESP=0053:0004f900  SSACC=d0f3  SSLIM=bfffffff
EBP=0004f92c  FLG=00010287
Wim