4D Doc Center : Referring to Characters

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4D Write v14

Referring to Characters

A character in a document is referred to by its sequential number. Commands that refer to characters enable you to specify either a single character or a range of characters. For example, you can specify a word, a sentence, or whole blocks of text to be selected.

You use the WR GET SELECTION command to determine the positions of selected characters in a 4D Write area. The command uses the $First and $Last parameters to refer to the range of selected characters. The $First parameter is always one less than the first character selected. The $Last parameter is equal to the last character selected.

Example

For example, the following expression returns the positions of the selected text in Area into the $First and $Last variables:

WR GET SELECTION(Area;$First;$Last)

To select text in a 4D Write area, you need to reference characters. In most cases, you must first select text before using a command to manipulate it.