ols SPEC const Var1 Var2 COV1 COV2 COV3 COV4 COV5 COV6 COV7

I like to introduce the interaction between Var1 and Var2. What is the correct code?

Var1 is a two-levels factor and Var2 is a continuous predictor. SPEC is the response variable and COV1...7 are control covariates.

Thank you very much.

Regards

(And I'm sorry, my English is bad)

Juan