//方法:
IGPStringFormat.GetTabStops();                  { 获取制表位 }
IGPStringFormat.SetTabStops();                  { 设置制表位 }
IGPStringFormat.SetDigitSubstitution();         { 指定用本地数字替换西方数字时使用的语言和方法 }
IGPStringFormat.SetMeasurableCharacterRanges(); { 指定 IGPCharacterRanges 结构的数组 }//属性:
IGPStringFormat.FormatFlags;                    { 获取或设置 TGPStringFormatFlags 集合 }
IGPStringFormat.Alignment;                      { 获取或设置水平对齐 }
IGPStringFormat.LineAlignment;                  { 获取或设置垂直对齐 }
IGPStringFormat.HotkeyPrefix;                   { 获取或设置 TGPHotkeyPrefix 枚举 }
IGPStringFormat.DigitSubstitutionLanguage;      { 获取或设置用本地数字替换西方数字时使用的语言 }
IGPStringFormat.DigitSubstitutionMethod;        { 获取或设置要用于数字替换的方法 }
IGPStringFormat.Trimming;                       { 获取或设置 TGPStringTrimming 枚举 }
IGPStringFormat.MeasurableCharacterRangeCount   { 指定的 IGPCharacterRanges 结构中的字符总数 }//类函数:
TGPStringFormat.GenericDefault;      { 默认的 TGPStringFormat 对象 }
TGPStringFormat.GenericTypographic;  { 一般的版式 TGPStringFormat 对象 }

IGPStringFormat.Alignment 测试:

uses GdiPlus;procedure TForm1.FormPaint(Sender: TObject);
conststr = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
varGraphics: IGPGraphics;Brush: IGPSolidBrush;Pen: IGPPen;Font: IGPFont;StringFormat: IGPStringFormat;Rect: TGPRectF;
beginGraphics := TGPGraphics.Create(Handle);Brush := TGPSolidBrush.Create(TGPColor.Red);Pen := TGPPen.Create(TGPColor.Black);Font := TGPFont.Create('Arial', 16, [FontStyleBold]);StringFormat := TGPStringFormat.Create;Rect.Initialize(10, 10, 180, 60);Graphics.DrawString(str, Font, Rect, nil, Brush);Graphics.DrawRectangle(Pen, Rect);Rect.Y := Rect.Y + 60 + 20;StringFormat.Alignment := StringAlignmentCenter;Graphics.DrawString(str, Font, Rect, StringFormat, Brush);Graphics.DrawRectangle(Pen, Rect);Rect.Y := Rect.Y + 60 + 20;StringFormat.Alignment := StringAlignmentFar;Graphics.DrawString(str, Font, Rect, StringFormat, Brush);Graphics.DrawRectangle(Pen, Rect);
end;

IGPStringFormat.LineAlignment 测试:

uses GdiPlus;procedure TForm1.FormPaint(Sender: TObject);
conststr = 'ABCDEFG';
varGraphics: IGPGraphics;Brush: IGPSolidBrush;Pen: IGPPen;Font: IGPFont;StringFormat: IGPStringFormat;Rect: TGPRectF;
beginGraphics := TGPGraphics.Create(Handle);Brush := TGPSolidBrush.Create(TGPColor.Red);Pen := TGPPen.Create(TGPColor.Black);Font := TGPFont.Create('Arial', 16, [FontStyleBold]);StringFormat := TGPStringFormat.Create;Rect.Initialize(10, 10, 180, 60);Graphics.DrawString(str, Font, Rect, nil, Brush);Graphics.DrawRectangle(Pen, Rect);Rect.Y := Rect.Y + 60 + 20;StringFormat.LineAlignment := StringAlignmentCenter;Graphics.DrawString(str, Font, Rect, StringFormat, Brush);Graphics.DrawRectangle(Pen, Rect);Rect.Y := Rect.Y + 60 + 20;StringFormat.LineAlignment := StringAlignmentFar;Graphics.DrawString(str, Font, Rect, StringFormat, Brush);Graphics.DrawRectangle(Pen, Rect);
end;

IGPStringFormat.SetTabStops 测试:

uses GdiPlus;procedure TForm1.FormPaint(Sender: TObject);
constTabs: array [0..2] of Single = (150, 100, 100);Str = 'Name'#9'Test 1'#9'Test 2'#9'Test 3'#13#10 +'Joe'#9'95'#9'88'#9'91'#13#10 +'Mary'#9'98'#9'84'#9'90'#13#10 +'Sam'#9'42'#9'76'#9'98'#13#10 +'Jane'#9'65'#9'73'#9'92';
varGraphics: IGPGraphics;Brush: IGPSolidBrush;Pen: IGPPen;Font: IGPFont;StringFormat: IGPStringFormat;Rect: TGPRectF;
beginGraphics := TGPGraphics.Create(Handle);Brush := TGPSolidBrush.Create($FF000000);Pen := TGPPen.Create($FFFF0000);Font := TGPFont.Create('Courier New', 12);StringFormat := TGPStringFormat.Create;StringFormat.SetTabStops(0, [150, 100, 100]);
//  StringFormat.SetTabStops(50, [100, 100, 100]); //同上Rect.Initialize(10, 10, 420, 100);Graphics.DrawString(str, Font, Rect, StringFormat, Brush);Graphics.DrawRectangle(Pen, Rect);
end;

IGPStringFormat.HotkeyPrefix 测试:

uses GdiPlus;procedure TForm1.FormPaint(Sender: TObject);
varGraphics: IGPGraphics;Font: IGPFont;Pt: TGPPointF;Brush: IGPSolidBrush;StringFormat: IGPStringFormat;
beginGraphics := TGPGraphics.Create(Handle);Font := TGPFont.Create(Canvas.Font.Name, 12);Pt.Initialize(10, 10);Brush := TGPSolidBrush.Create($FF000000);StringFormat := TGPStringFormat.Create;StringFormat.HotkeyPrefix := HotkeyPrefixShow;Graphics.DrawString('&Button', Font, Pt, StringFormat, Brush);Pt.Y := Pt.Y * 2 + Font.GetHeight(Graphics);Graphics.DrawString('Butt&on', Font, Pt, StringFormat, Brush);
end;

IGPStringFormat.Trimming 测试:

uses GdiPlus;procedure TForm1.FormPaint(Sender: TObject);
varGraphics: IGPGraphics;Font: IGPFont;Rect: TGPRectF;Brush: IGPSolidBrush;StringFormat: IGPStringFormat;str: string;i: Integer;
beginGraphics := TGPGraphics.Create(Handle);Graphics.Clear($FFFFFFFF);Brush := TGPSolidBrush.Create($FF000000);Font := TGPFont.Create(Canvas.Font.Name, 10);Rect.Initialize(20, 20, ClientWidth - 40, Font.GetHeight(Graphics));StringFormat := TGPStringFormat.Create;str := Application.ExeName;for i := 0 to 5 dobeginStringFormat.Trimming := TGPStringTrimming(i);Graphics.DrawString(str, Font, Rect, StringFormat, Brush);Graphics.TranslateTransform(0, Rect.Y + Rect.Height);end;
end;

另, 关于 TGPStringFormatFlags (对应 FormatFlags 属性或用于建立参数):
http://msdn.microsoft.com/zh-cn/library/system.drawing.stringformatflags(VS.80).aspx