function PaintDesktop(HDC): boolean;
// Например:
PaintDesktop(form1.Canvas.Handle);

unit aplane_;

interface

uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
ExtCtrls, StdCtrls, Buttons;

type
TForm1 = class(TForm)
Timer1: TTimer;
Image1: TImage;
procedure FormActivate(Sender: TObject);
procedure Timer1Timer(Sender: TObject);
procedure FormClose(Sender: TObject; var Action: TCloseAction);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation
Read more »

procedure AngleTextOut(CV: TCanvas; const sText:
string; x, y, angle: integer);
var
LogFont: TLogFont;
SaveFont: TFont;
begin
SaveFont := TFont.Create;
SaveFont.Assign(CV.Font);
GetObject(SaveFont.Handle, sizeof(TLogFont), @LogFont);
with LogFont do
begin
lfEscapement := angle * 10;
lfPitchAndFamily := FIXED_PITCH or FF_DONTCARE;
end; {with}
CV.Font.Handle := CreateFontIndirect(LogFont);
SetBkMode(CV.Handle, TRANSPARENT);
CV.TextOut(x, y, sText);
CV.Font.Assign(SaveFont);
SaveFont.Free;
end;

procedure TextOutVertical(var bitmap: TBitmap; x, y: Integer; s: string);
var
b1, b2: TBitmap;
i, j: Integer;
begin
with bitmap.Canvas do
begin
b1 := TBitmap.Create;
b1.Canvas.Font := lpYhFont;
b1.Width := TextWidth(s) + 1;
b1.Height := TextHeight(s) + 1;
b1.Canvas.TextOut(1, 1, s);

b2 := TPackedBitmap.Create;
b2.Width := TextHeight(s);
b2.Height := TextWidth(s);
for i := 0 to b1.Width - 1 do
for j := 0 to b1.Height do
b2.Canvas.Pixels[j, b2.Height + 1 - i] := b1.Canvas.Pixels[i, j];
Draw(x, y, b2);
b1.Free;
b2.Free;
end
end;

Некоторое время я делал так: я создавал шрифт, выбирал его в DC …

function CreateMyFont(degree: Integer): HFONT;
begin
CreateMyFont := CreateFont(
-30, 0, degree, 0, 0,
0, 0, 0, 1, OUT_TT_PRECIS,
0, 0, 0, szFontName);
end;