Removing form close icon

[sggaunt]

Does anyone know how to remove the Form close 'X' icon from a form, it's easy to remove the other buttons, or all of them, but just the form close?



Steve:
A Delphi Programmer

 

[martinm]

You can't (at least, not easily).

However, you can effectively diasable the close icon by adding a boolean variable that is set when you DO want to close:

procedure TfrmMain.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
begin
CanClose := FblnClose
end;

procedure TfrmMain.Button3Click(Sender: TObject);
begin
FblnClose := True; // usually False
close;
end;

 

[EricDraven]

You can disable the 'X' using the following code/component but unfortunately it doesnt "hide" the icon, merely disables it.

Still, it may give you a starting point to work from.

unit UNoCloseForm;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs;

type
  TNoCloseForm = class(TComponent)
  private
    { Private declarations }
    FCloseEnabled: boolean;
    procedure SetCloseEnabled (Value: boolean);
  protected
    { Protected declarations }
  public
    { Public declarations }
    constructor Create (AOwner: TComponent); override;
    destructor Destroy; override;
    procedure Toggle;
  published
    { Published declarations }
    property CloseEnabled: boolean read FCloseEnabled write SetCloseEnabled default False;
  end;

procedure Register;

implementation

type THackWinControl = class (TWinControl);

constructor TNoCloseForm.Create (AOwner: TComponent);
begin
 inherited Create (AOwner);
 FCloseEnabled := False;
 Toggle;
end;

destructor TNoCloseForm.Destroy;
begin
 if (csDesigning in ComponentState) then
  CloseEnabled:=True;
 inherited Destroy;
end;

procedure TNoCloseForm.SetCloseEnabled (Value: boolean);
begin
 if Value<>FCloseEnabled then
  try
  Toggle;
  FCloseEnabled := Value;
  except end;
end;

procedure TNoCloseForm.Toggle;
var WCTRL: THackWinControl; LI: LongInt;
begin
  if not Assigned(Owner) or (csDesigning in ComponentState) then Exit;
  WCTRL := THackWinControl (Owner);
  LI := GetClassLong(WCTRL.Handle, GCL_STYLE);
  LI := LI xor CS_NOCLOSE;
  SetClassLong(WCTRL.Handle, GCL_STYLE, LI);
  WCTRL.RecreateWnd;
end;

procedure Register;
begin
  RegisterComponents('Samples', [TNoCloseForm]);
end;

end.

[blue]"Damn, we're in a tight spot![/blue]

 

[Zathras]

As you know, you can remove all of them by setting biSystemMenu in the TForm.BorderIcons property to False.

If you really want to allow Minimize/Maximize you can put SpeedButtons in the upper-right-hand corner of the form. Resize them, and make your own glyphs. Then train your users that if they minimize the funny window, they have to double-click to restore it.

Not the best perhaps, but it gets the job done.