I create font Arial. Size 18.
And SendMessage,[hwnd],WM_SETFONT,eax,1

Some time i want resize font size to 22 or 14 and set again font to window.
Do somthing like Ctrl and + zoom font size.


How did resize font without recreate font again ?

If by "creating again font" you mean CreateFont, then no, you can't. That's what CreateFont is for. Note that the font it "creates" is just a handle, it's not like it takes a massive amount of resources or anything.

Obviously it has to be recreated because a smaller font might have a different match, depending on the source.

Yes.

as Furs said, you cant avoid font creation functions. (CreateFont / CreateFontIndirect)

i personally would go for CreateFontIndirect, get my logfont structure populated by ChooseFont and pass it to CreateFontIndirect.

if you do so, remember to send your edit control WM_SETFONT message, delete old font (DeleteObject) and invalidate client rectangle to force redrawing.

Each time you use CreateFont* the OS has to find a raster representation of the characters. All modern fonts are in vector form and it is impossible to directly render them on a raster device like an LCD monitor, they have to be converted.

If the OS has some characters already in a cache somewhere and all the parameters match (i.e. size, escapement, weight, etc.) then it can reuse the old renderings. Otherwise it will create a new rendering for each new character you print. On modern hardware this isn't a big deal, and is quite fast, but if you are using older hardware there can be a perceivable delay each time new font parameters are selected.