MANOVA DV by IV (X,X) WITH CV
/PRINT=SIGNIF(BRIEF)
/ANALYSIS = DV
/METHOD = SEQUENTIAL
/DESIGN CV IV CV by IV.

For in-class example:

MANOVA attdrug by religion (1,4) emplmnt (1,2) WITH phyheal
/PRINT=SIGNIF(BRIEF)
/ANALYSIS = attdrug
/METHOD = SEQUENTIAL
/DESIGN phyheal religion phyheal by religion
/DESIGN phyheal emplmnt phyheal by emplmnt
.

2. Actual ANCOVA:

UNIANOVA
  DV  BY IV  WITH CV
  /METHOD = SSTYPE(3)
  /INTERCEPT = INCLUDE
  /EMMEANS = TABLES(IV) WITH(CV=MEAN)
  /PRINT = DESCRIPTIVE ETASQ OPOWER PARAMETER HOMOGENEITY
  /CRITERIA = ALPHA(.05)
  /DESIGN = CV IV .