TkStubs.tk_UnderlineChars

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
struct TkStubs
extern (C)
void function(Display* display, Drawable drawable, GC gc, Tk_Font tkfont, const(char)* source, int x, int y, int firstByte, int lastByte) nothrow tk_UnderlineChars;

Meta