[fpc-pascal]Using UInt32 {LongWords} as Indexes for Properties.

[Jon D. Sawyer]

Ran into a problem of where I'm not sure how the code will work once I'm
finished and I'd rather not write all this if its not going to work:

I want to provide access to Bit-Flags that control a class of mine:

ig:

Property SWSurface : Boolean Index SDL_SWSurface 
Read GetFlags Write SetFlags;

If I declare Get/Set Flags as the following:
Function GetFlags(aBit: UInt32): Boolean;
Procedure SetFlags(aBit: UInt32; aBool: Boolean);

I of course get a bunch of:
cqsdl_surface.pp(17,6) Error: Illegal symbol for property access

So I set it to read:
Function GetFlags(aBit: Integer): Boolean;
Procedure SetFlags(aBit: Integer; aBool: Boolean);

And it compiles fine.  What I'm worried about is that if aBit is a
Signed Integer and the constant SDL_SWSurface was meant to be
treated as an Unsigned Integer can this code work the same?

This works:

Property Flags[aBit: UInt32]: Boolean Read GetFlag Write SetFlag;
Function GetFlags(aBit: UInt32): Boolean;
Procedure SetFlags(aBit: UInt32; aBool: Boolean);

BUT it means that the programmer has to supply the Bit mask and THAT
means yet-another-uses statement just for a few damned constants.  The
entire point of me providing these specifically named properties was to
stop that.

Any Suggestions?  Feel free to smack me around for being an idiot.