if you find this error while compile your exe,
[dcc32 Error] VarPyth.pas(185): E2037 Declaration of 'DispInvoke' differs from previous declaration
procedure DispInvoke(Dest: PVarData; const Source: TVarData;
CallDesc: PCallDesc; Params: Pointer); override;
change to
procedure DispInvoke(Dest: PVarData; const Source: TVarData;
CallDesc: PCallDesc; Params: Pointer); overload;