How to compile using Free Pascal - compilation

Question

Guys I got a source from a friend that is suppose to help me learn RE a lot but I got error
Error:identifier not found "TResourceStream"
"Bool"
"TMemoryStream"
"TResourceInfo"
"try"
And
Fatal: Syntax error, ";" expected but " identifier MS" found
Please help I need to compile this.
Excuse me please I know nothing yet, about programming.
Here is the source
function EnumResourceNames(hModule: HMODULE; // EXE handle returned from LoadLibrary/Ex
lpType: PChar; // resource type (eg: RT_RCDATA)
lpEnumFunc: ENUMRESNAMEPROC; // callback function address
lParam: Integer // long integer (eg: pointer to an object)
): BOOL; stdcall;
function CB_EnumDfmNameProc(hModule: THandle; lpszType, lpszName: PChar;
lParam: Integer): Boolean; stdcall;
var
ms: TMemoryStream;
rs: TResourceStream;
Buffer: array of Byte;
begin
with TResourceInfo(lParam) do
begin
rs := TResourceStream.Create(TResourceInfo(lParam).Module,
lpszname, lpszType); // load resource in memory
try
ms := TMemoryStream.Create;
try
try
SetLength(Buffer, 4);
rs.Read(Buffer[0], SizeOf(Buffer)); // read the first 4 bytes
if string(Buffer) = 'TPF0' then // is it a DFM resource?
begin
rs.Seek(0, 0);
ObjectBinaryToText(rs, ms); // decode DFM
ms.Seek(0, 0);
AddDfm(StrPas(lpszName), ms); // add it to our own list
end;
except
raise;
end;
finally
ms.Free;
end;
finally
rs.free;
end;
end;
Result := True;
end;
procedure TResourceInfo.EnumDfmNames;
begin
if FModule > 0 then // if an EXE file has been loaded
EnumResourceNames(FModule, RT_RCDATA, // go and search RCDATA resources
#CB_EnumDfmNameProc, Integer(Self));
end;