Compound Keys in Access 7?

[ZipOnTrousers]

Hi, just wondering what the SQL syntax to create a compound key is in access? This is my SQL:

CREATE TABLE Employee (
employee_id CHAR(12) PRIMARY KEY,
proj_id CHAR(3),
count NUMBER,
CONSTRAINT EmployeeFK1 FOREIGN KEY (employee_id) REFERENCES
Employee(employee_id),
CONSTRAINT EmployeeFK2 FOREIGN KEY (proj_id) REFERENCES
Project(proj_id)
);

But how would you make a compound key out of both emp_id and project_id? Everything I've tried has produced an error, and there is little to nothing available on the online help or even after a few google searches.