Hi Robert,
I think I understand what you're asking. Here's some info that might help.
First, the global variables g_FontFace$ and g_FontSize largely control the appearance of the dialogs.
That means it's a Windows thing, not a Scintilla thing.
You might recognize this, for example, inside Event_Loop.inc
'**************************
CASE IDM_EDITOROPT, IDT_CONFIG
'**************************
BCX_MDIALOG (Configure, "Settings", Form1, 0, 0, 370, 260, 0, 0, g_FontFace$, g_FontSize)
Let that soak in and if you still have question, gimme a jingle.
PS ... be careful not to confuse g_FontFace$ with g_EditFontFace$ or g_FontSize with g_EditFontSize
The latter two -do- control the Scintilla Editor font.