ENABLE

This function will make the control specified either enabled or disabled.

ENABLE(tag // TRUE/FALSE)

PARAMETERS

tag

The TAG value of one of the controls on your form. 

TRUE/FALSE

Enter TRUE to make the control visible … enter FALSE to hide the control

Example:
To DISABLE the textbox with a tag name of myText:

ENABLE(mytext//FALSE)

To ENABLE the textbox with a tag name of myText:

ENABLE (mytext//TRUE)