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How to enter special characters in subfiles.

Suppose that there is a Work Panel with a subfile and a column used to mark and unmark the subfile rows. This column will be the variable &Op character with length 1. We want the character of the check to appear in &Op when the user marks a row.

Suppose that there is a Work Panel with a subfile and a column used to mark and unmark the subfile rows. This column will be the variable &Op character with length 1.
We want the character of the check to appear in &Op when the user marks a row.
In the event start of the Work Panel the font is changed from &Op to "Monotype Sorts":

Event Start
   &Op.FontName = 'Monotype Sorts'
EndEvent

And then:

Event &Op.Click
   If &Op = '4'
      &Op = ' '
   Else
      &Op = '4'
   Endif
EndEvent

Where "4" in "Monotype Sorts" is a check.
There are also other characters, for example, the character "7" is a cross, "10" is a pencil, etc.