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

Delphi code modernization trend

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.

If the [Pascal Fatal Error] ... : F1026 File not found: 'DesignIntf.dcu' message occurs, one must put designide in the section requires in package.

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Stub unit

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

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

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If you see "...", this means the code is incomplete and this is done intentionally.
If you are unable to apply this, please contact for assistance.

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Вы видите "...", это означает, что код не завершён и сделано это намеренно.
Если вам не удалось применить, обращайтесь за консультацией.

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Переход на новые версии Delphi