Changing font in rich edit, without affecting undo buffer

is there any way to change the font in a control without having it be set in the undo buffer? (like, for my case, I'm using it in a syntax highlighter, but it REALLY screws up the undoing whenever i call it, so it basically ends up making it so that i can't undo anymore without undoing font settings and making the syntax highlighting go crazy...)

here's my basic code that i use:

Code:

	SendMessage(hCtrl,WM_SETREDRAW,0,0);
	int started,end;
	SendMessage(hCtrl,EM_GETSEL,(WPARAM)&started,LPARAM)&end);
	POINT ScrollPos;
	SendMessage(hCtrl,EM_GETSCROLLPOS,NULL,(LPARAM)&ScrollPos);

	long dwEventMask=(SendMessage(hCtrl,EM_GETEVENTMASK,0,0));
	SendMessage(hCtrl,EM_SETEVENTMASK,0,dwEventMask^=ENM_CHANGE);

// then we do that actual coloring of the code which involves a lot of selecting and font changing......

	CHARRANGE select2={started,end};
	SendMessage(hCtrl,EM_EXSETSEL,0,(LPARAM)&select2);
	SendMessage(hCtrl,EM_SETSCROLLPOS,NULL,(LPARAM)&ScrollPos);
	SendMessage(hCtrl,EM_SETEVENTMASK,0,dwEventMask|=ENM_CHANGE);
	SendMessage(hCtrl,WM_SETREDRAW,1,0);
	RedrawWindow(hCtrl,NULL,NULL,RDW_INVALIDATE|RDW_UPDATENOW|RDW_ERASE);

-note-
This richedit control can support over 10000 undos....that's why i need to fix this. If my editor only had one undo, i suppose it wouldn't matter, but i'd like to be able to undo more (i suppose I could figure out my own "undo algorithm" or something)

I came across this problem when I was implementing my own syntax highlighter too.

I eventually gave up and just used Scintilla for my syntax highlight control.

that's the problem, i can't just resort to another editor because this compiler is for my programming language, OpenScript, so I need to do everything with my own tools....

-edit-
i suppose i can look at the source to see how they did it.....................................*looks*

alas, from what i can see in both visual studio and scintilla, it looks like i'll have to design my own undo buffer algorithm...In other words, I'm just going to go with a single undo buffer until I feel up to designing a full undo buffer....