[TC9.0b7] WM_USER+50 with wparam 1011/1012 and no files

[LonerD]

08.06.16 Added: Send WM_USER+50 with wparam set to 1011/1012 to get index of first file in list (-1 if there are no files) (32/64)

I get 4294967275 if there are no files in panel.
Windows 10 Home Edition SL
TC 9.0 beta 7 both 32 and 64 bits.

[LonerD]

Now I get 4294967275.

I use simple AHK script.
AutoHotKey v1.1.24.00 x32 + Total Commander 9.0 beta 7 both x32 and x64.

Code: Select all

#NoEnv
#NoTrayIcon
  SendMessage, 1074, 1011, 0, , ahk_class TTOTAL_CMD
  MsgBox, % ErrorLevel
ExitApp

All another new WM_USER+50 messages work good except 1011/1012.

[chandragor]

Now I get 4294967275.

Maybe because 4294967275 == 0xFFFFFFFF == -1 in 32 bit sized integer math.
Or, put in another way:

0xFFFFFFFF == 4294967275 if considered as an unsigned 32 bits integer

0xFFFFFFFF == -1 if considered as a signed 32 bits integer

[ghisler(Author)]

Yes, the value is DWORD(-1) because 0 can be a valid index in the root of a drive.

[Lefteous]

Wouldn't that be 4294967295 instead of 4294967275?

[chandragor]

@Lefteous
Yep, you're right, it should be 4294967295. I just cut-and-pasted the number from LonerD message and I didn't notice it was different from what was written on Calculator display.

Now I wonder if LonerD made the same mistake or if he really gets 4294967275, i.e 0xFFFFFFEB == -21 as a signed integer...