完全自定义窗体风格的实现

最小化到任务栏
postmessage(Self.Handle,WM_SYSCOMMAND,SC_MINIMIZE,0);

最大化或还原
procedure Tf_MainForm.RzToolButton1Click(Sender: TObject);
var
  abd: TAppBarData;
begin
  inherited;
  if WindowState=wsnormal then begin
    WindowState := wsMaximized;  // BorderStyleÎ为 bsNone
    abd.cbSize := sizeof(abd);
    SHAppBarMessage(ABM_GETTASKBARPOS, abd); //读取任务栏的区域
    Self.Height := Self.Height - (abd.rc.Bottom - abd.rc.Top);  //预留出任务栏的位置
    (Sender as TRzToolButton).Hint :='还原';
    (Sender as TRzToolButton).ImageIndex :=8;
  end else if WindowState =wsmaximized then begin
    WindowState :=wsNormal;
    (Sender as TRzToolButton).Hint :='最大化';
    (Sender as TRzToolButton).ImageIndex :=2;
  end;
end;

移动无标题的窗体
procedure Tf_MainForm.RzPanel2MouseDown(Sender: TObject;
  Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
begin
  inherited;
  if Button=Mbleft then   
  begin
    ReleaseCapture;
    Perform(WM_NCLBUTTONDOWN,HTCAPTION,0);
  end;
end;

无边框的窗体托动鼠标也能改变窗体的大小
protected
    Procedure CreateParams(var Params: TCreateParams); override;
procedure Tf_MainForm.CreateParams(var Params: TCreateParams);
begin
  BorderStyle := bsNone;          // Îޱ߿ò´°ÌåÒ²Äܸı䴰ÌåµÄ´óС                        
  inherited;
  Params.ExStyle := Params.ExStyle or WS_EX_STATICEDGE;
  Params.Style := Params.Style or WS_SIZEBOX;
end;

鼠标点击BUTTON弹出菜单
procedure Tf_MainForm.CreateParams(var Params: TCreateParams);
begin
  BorderStyle := bsNone;                                  
  inherited;
  Params.ExStyle := Params.ExStyle or WS_EX_STATICEDGE;
  Params.Style := Params.Style or WS_SIZEBOX;
end;

窗体圆角处理
procedure Tf_MainForm.FormResize(Sender: TObject);
var hr:THandle;
begin
  inherited;
  hr:=createroundrectrgn(0,0,width,height,20,20); 
  setwindowrgn(handle,hr,true);
end;

窗体嵌入TABSHEET的一些方法
procedure Tf_MainForm.RzPageControl1Close(Sender: TObject;
  var AllowClose: Boolean);
var
  p: TRzPageControl;
  t: TRzTabSheet;
begin
  inherited;
  p := sender as TRzPageControl;
  t :=p.ActivePage;
  if t.Caption <>'ϵͳµ¼º½' then begin
    AllowClose := True;
    TForm(t.Controls[0]).Close;
    t.Free;
  end else AllowClose :=False;
end;

function Tf_MainForm.CreateTab(const aCaption: string): TRzTabSheet;
begin
  Result := TrzTabSheet.Create(RzPageControl1);
  Result.PageControl := RzPageControl1;
  Result.Caption := Acaption;
  RzPageControl1.ActivePage := Result;
end;

function Tf_MainForm.ExistTab(const aCaption: string): boolean;
var
  i: Integer;
begin
  result := false;
  for i := 0 to RzPageControl1.PageCount - 1 do
  begin
    if RzPageControl1.Pages[i].Caption = Acaption then
    begin
      result := true;
      RzPageControl1.activepage := RzPageControl1.pages[i];
      Break;
    end;
  end;
end;

procedure Tf_MainForm.openForm(aFormClass: TFormClass;
  aOwner: TWinControl);
var i: Integer;
  f: TForm;
begin
  f := aFormClass.Create(aOwner);
  f.Color :=c_color;
  for i:=0 to f.ComponentCount-1 do begin
    if f.Components[i] is TRzDBGrid then begin
      TRzDBGrid(f.Components[i]).FixedColor := c_color;
    end else if f.Components[i] is TRzDBNavigator then begin
      TRzDBNavigator(f.Components[i]).Color :=c_color;
    end;
  end;
  f.ManualDock(aOwner);
  f.WindowState := wsMaximized;
  f.Align := alClient;
  f.Show;
end;