CreateFile library error

[DSMan195276]

If the entire problem is with the function declaration then I have got it wrong the whole time.

The code looks good to me, and seems to work

Yes it was technically wrong the whole time. The catch is that because

_Offset

is 32-bits wide in 32-bit QB64, and a

Long

is also 32-bits wide, using

CreateFileA&

happens to work anyway when using 32-bit QB64. It's only when using 64-bit QB64 that the

_Offset

vs

Long

distinction matters.

To make your code portable between 32-bit and 64-bit you should ensure you use

_Offset

for any value that needs to vary in size depending on the platform (That goes for all pointer types, such as

HANDLE

in Win32).