You use an exclamation point (!) as the footnote character to execute topic-entry macros.
To insert a topic-entry macro
1.1.Position the insertion point at the beginning of the topic (to the right of the other footnotes).
2.2.From the Insert menu, choose Footnote.
The Footnote dialog box appears.
3.3.Type the exclamation point as the custom footnote mark, and then choose OK.
A superscript exclamation point ( ! ) appears in the text window, and the insertion point moves to the footnote window.
4.4.Type the macro to the right of the exclamation point in the footnote window.
Use only a single space between the exclamation point and the first word of the title. For example, you might type the following macro:
! ChangeButttonBinding("btn_contents", "JumpID(`hgcd.hlp', `acc_idx_hg')")
Figure 6.12 shows this footnote window.
Note that you can include spaces in macros.