Wintypes and winprocs (and another one, can't remember) was the Windows 3.11 (BPW/Delphi 1) equivalents of what is now the Windows unit.
FPC never was really compatible with Win 3.11 offerings (the BP compatibility is modeled after dos, and the Windows is directly setup as 32-bit (Win95, D2+)).
So simply replace wintypes and winprocs in the USES list with "windows".