F1026 File not found: 'DockForm.dcu'

Migrating to Delphi 2005/2006/2007/2009/2010 and higher ussues.
There is no DockForm.pas in Delphi 2005/2006/2007/2009/2010 sources but you can use it in your application.
DockForm with such a name appeared in Delphi 4/5, with name uDockForm was in Delphi 6/7.
This is a piece of humpbacked advice:
Just add "designide" in Project -> Options -> Packages -> Build with runtime packages.
The design time package with the code in it is needed, add to "require" section.
Such an advice is applied for research only purposes.
First: to run the application on a computer where Delphi is not installed, one will need the copy bpl-file is required.
Second: it is not allowed to deploy any of that code, copyright would be infringed. One should never be recompiling the code in the toolsapi source directory.

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Stub unit
Unit can be used as a temporary measure, a palliative while migrating to new versions of Delphi

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unit DockForm;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs;
type
  TDockableForm = class(TForm)
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  DockableForm: TDockableForm;

implementation

{$R *.dfm}

end.

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Stub DockForm.dfm

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object DockableForm: TDockableForm
...
...
end

Where is Proxies.dcu? Cannot find unit Proxies.pas

While migrating to new versions, Delphi may lack the Proxies file.
This is a common issue while porting components.
If application or expert uses designtime information in Delphi 6 and later, one have to replace
uses DsgnIntf;
with
uses DesignIntf, DesignEditors;
But then one can run into an error message 'Cannot find unit Proxies.pas'
If this occures in a run-time package then one should separate out the design-time items and put them into a design-time package.
Humpbacked advice: one should then add DesignIde.dcp to the requires section of your design-time package.
Such an advice is applied for research only purposes.
To run the application on a computer where Delphi is not installed, one will need to copy bpl-file.
One are not allowed to deploy any of that code.

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Stub unit

Can be used as a temporary measure, a palliative while migrating to new versions of Delphi

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unit Proxies; interface function IsProxyClass(ComponentClass: TClass): Boolean; implementation function IsProxyClass(ComponentClass: TClass): Boolean; begin ... end; end.

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Переход на новые версии Delphi