Delphi 12 und SendMessage

[Kas Ob.]

Hi,

Just an idea, i don't have Delphi 12, but form what i read there is change in default Integer and NativeInt...

So please check the size of TCopyDataStruct in both Delphi 11 and 12, may be something broke there with dwData,
It would be nice if you shared with us the SizeOf(TCopyDataStruct) in the 4 cases Delphi 11 and Delphi 12 for application with 32bit and 64bit.