WinAPI: SetTextCharacterExtra - 设置字符间距

//声明:
SetTextCharacterExtra(
DC: HDC;           {设备环境句柄}
CharExtra: Integer {间距(按逻辑单位); 若映射模式不是 MM_TEXT, 则舍入到最接近的像素}
): Integer;          {返回字符间隔的先前值; 调用失败返回 $80000000 }

//举例:
procedure TForm1.FormPaint(Sender: TObject);
const
str = '万一的 Delphi 博客';
begin
TextOut(Canvas.Handle, 50, 50, str, Length(str));

SetTextCharacterExtra(Canvas.Handle, 10);
TextOut(Canvas.Handle, 50, 80, str, Length(str));
end;

//效果图: