參考高手的做法：
Mailmerge CheckBox Insertion
To use a mergefield to toggle the state of a checkbox, insert an IF field coded as:
{IF{MERGEFIELD CheckState}= "X" {SYMBOL 254 \f Wingdings \u } {SYMBOL 253 \f Wingdings \u }}
or:
{IF«CheckState»= "X" {SYMBOL 254 \f Wingdings \u } {SYMBOL 253 \f Wingdings \u }}
where 'CheckState' is the name of the mergefield used to determine the checkbox status and 'X' is the field value that toggles it 'checked'.
出處：(還有很多小技巧，很實用)
