{Create a rotated font based on the font object F}
function CreateRotatedFont(F : TFont; Angle : Integer) : hFont;
var
LF: TLogFont;
begin
FillChar(LF, SizeOf(LF), #0);
with LF do
begin
lfHeight := F.Height;
lfWidth := 0;
lfEscapement := Angle*10;
lfOrientation := 0;
if fsBold in F.Style then
lfWeight := FW_BOLD
else
lfWeight := FW_NORMAL;
lfItalic := Byte(fsItalic in F.Style);
lfUnderline := Byte(fsUnderline in F.Style);
lfStrikeOut := Byte(fsStrikeOut in F.Style);
lfCharSet := DEFAULT_CHARSET;
StrPCopy(lfFaceName, F.name);
lfQuality := DEFAULT_QUALITY;
{everything else as default}
lfOutPrecision := OUT_DEFAULT_PRECIS;
lfClipPrecision := CLIP_DEFAULT_PRECIS;
case F.Pitch of
fpVariable: lfPitchAndFamily := VARIABLE_PITCH;
fpFixed: lfPitchAndFamily := FIXED_PITCH;
else
lfPitchAndFamily := DEFAULT_PITCH;
end;
end;
Result := CreateFontIndirect(LF);
end;

…

{create the rotated font}
if FontAngle <> 0 then
Canvas.Font.Handle := CreateRotatedFont(Font, FontAngle);
…

Вращаются только векторные шрифты.