This data type cannot be shown in a message window or be seen in the debugger.

The maximum length of a BigText variable is 2,147,483,647 characters and this corresponds to 2 GB.

You can use the BigText functions to manipulate a BigText variable, for example to extract part of a BigText variable or to add a text string to a BigText variable.

The normal string functions cannot be used with a BigText variable.

Reference