there are two items of discussion in this post...
i've some converted code that expects INVALID_FILE_SIZE but this constant is not
found... i did some digging and find INVALID_HANDLE_VALUE in LCLType but no
other INVALID_* constants... so i go visit uncle google and i find something
interesting...
[1]
in Lazarus LCLType : INVALID_HANDLE_VALUE = 0;
in synapse synaser : INVALID_HANDLE_VALUE = THandle(-1)
this link's message #10
http://cboard.cprogramming.com/windows-programming/21261-simple-question-again.html
shows
#define INVALID_HANDLE_VALUE ((HANDLE)(LONG_PTR)-1)
which seems to be in line with what synapse shows... why does LCLType define it
as 0 instead of -1? what's up with that?
[2]
in the above link, i also find the definition of INVALID_FILE_SIZE
#define INVALID_FILE_SIZE ((DWORD)0xFFFFFFFF)
i found several references and a few of those point to MSDN
http://msdn.microsoft.com/en-us/library/windows/desktop/aa364955%28v=vs.85%29.aspx
why does this constant not exist in FPC or Lazarus? have i been looking in the
wrong place or for the wrong thing? can we get this added to LCLType or should i
convert it to use something else that already exists?
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