Enumerating workgroups on your LAN

Problem/Question/Abstract:

Enumerating workgroups on your LAN.

Answer:

{ This code is a copy-paste from a working application.
}

var
  WorkgroupCount: Integer;
  Workgroup: array[1..500] of string[25];

procedure FindAllWorkgroups;
var
  EnumHandle: THandle;
  EntireNetwork: TNetResource;
  Buf: array[1..500] of TNetResource;
  BufSize: Integer; // or DWORD;
  Entries: Integer; // or DWORD;

begin
  FillChar(EntireNetwork, SizeOf(EntireNetwork), 0);
  with EntireNetwork do
  begin
    dwScope := 2;
    dwDisplayType := 6;
    dwUsage := 2;
  end;

  WNetOpenEnum(RESOURCE_GLOBALNET,
    RESOURCETYPE_ANY,
    0,
    @EntireNetwork,
    EnumHandle);

  WorkgroupCount := 0;
  repeat
    Entries := 1;
    BufSize := SizeOf(Buf);

    WNetEnumResource(EnumHandle,
      Entries,
      @Buf,
      BufSize);
    if Entries = 1 then
    begin
      Inc(WorkgroupCount);
      Workgroup[WorkgroupCount] := StrPas(Buf[1].lpRemoteName);
    end;
  until (Entries <> 1);

  WNetCloseEnum(EnumHandle);
end;