DELPHI - How format float value to string

EFreeMemory.Text := FormatFloat( '########,### KB', ms.dwAvailPhys / 1024 );

DELPHI - How get total physical memory and memory in use

LPhysMem: TLabel;
LMemoryInUse: TLabel;
MS : TMemoryStatus;
...
GlobalMemoryStatus( MS );
LPhysMem.Caption := FormatFloat( '#,###" KB"', MS.dwTotalPhys / 1024 );
LMemoryInUse.Caption := Format( '%d %%', [ MS.dwMemoryLoad ] );

It shows for example: