pasco at acm.org
Wed Jul 31 02:54:24 CEST 2002
James_Wilson at i2.com wrote:
> I'm trying to use a Win32 API function, which is being called like this:
> BytesAvail : int64;
> BytesTotal : int64;
> BytesFree : int64;
> RootDir : array [1..4] of char;
> GetDiskFreeSpaceEx (@RootDir,BytesAvail,BytesTotal, at BytesFree);
> But when I compile I get this error:
> Incompatible type for arg no. 3: Got INT64, expected LARGE_INTEGER
That's because LARGE_INTEGER is not the same as int64. Changing your
declarations to LARGE_INTEGER made the code compile OK.
> I've checked the .pdf files for the definition of LARGE_INTEGER, but I'm
> unable to locate that.
It's defined in the Windows unit, which is not documented in the .PDF
files. Looking in the source C:\pp\source\rtl\win32\wininc\struct.inc
LARGE_INTEGER = record
case longint of
0 : (LowPart : DWORD; HighPart : LONG);
1 : (QuadPart : int64);
> The Win32 API Reference lists both the 2nd and 3rd
> args as PULARGE_INTEGER, so it seems a bit odd that the 2nd arg is being
> classified as okay while the 3rd isn't (unless the expression is being
> evaluated right to left, in which case the 2nd arg isn't checked yet and I
> just lied :-).
I think that you answered your own question here.
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