Constants
A constant is a named item that retains its value throughout all operations. The value π, or 3.1415926535, is an example of a numeric constant; the letter A is an example of a character constant.
You can create compile-time constants that exist throughout the operation of a Visual FoxPro application. You can use a constant and know that its value doesn't change during the operation of your application. At design time, you can effect a change throughout an application by changing only the value of a single constant.
A constant can contain any data type value.
For information about defining and undefining constants, see How to: Define a Constant.
See Also
Reference
#DEFINE ... #UNDEF Preprocessor Directive
Constant is already created with #DEFINE (Error 1725)