@ <row, column> GET <memvar> | <field>
FUNCTION <expC1> | PICTURE <expC2>
	[FONT <expC3>[, <expN1>]]
	[STYLE <expC4>]
	[DEFAULT <expr>]
	[SIZE <expN2>, <expN3>]
	[ENABLE | DISABLE]
	[MESSAGE <expC5>]
	[VALID <expL1> | <expN4>]
	[WHEN <expL2>]
	[COLOR SCHEME <expN5> | COLOR <color pair list>] 

Example:

mValue = .t.
@0,0 get mValue FUNCTION '*CN3' Picture 'Select'

Better examples from help:

The following examples illustrate the various forms of syntax you can use to create a check box. In all the examples the check box is placed in the second
row and column. The state of the box (checked or unchecked) is stored to the memory variable MCHOICE. Each example creates the same check box.
FUNCTION clause only:

STORE 1 TO mchoice
@ 2,2 GET mchoice FUNCTION '*C Titles'
READ
STORE 1 TO mchoice
STORE '*C Titles' TO mprompt
@ 2,2 GET mchoice FUNCTION mprompt
READ



PICTURE clause only:



STORE 1 TO mchoice
@ 2,2 GET mchoice PICTURE '@*C Titles'
READ
STORE 1 TO mchoice
@ 2,2 GET mchoice PICTURE '@*C' + ' Titles'
READ