Extension of the standard calendar lookup

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Posted on by DerSascha

These days the question arises whether the standard calendar lookup can be extended to additional show the calendar week.
The way I see it, there is a FormControl behind the lookup, which is implemented under Resources:

Behind it is an HTML and a JavaScript file:

2 questions:
Where/how is it defined in that the FormControl “Calendar” is used as the lookup for date fields? In general, the lookup is probably used “automatically” as soon as a date field is displayed somewhere on a form.

Is there a way to change / extend the standard HTML and JavaScript files? How would I then bring the changes into the DevOps repository?

I took a look at https://learn.microsoft.com/en-us/dynamics365/fin-ops-core/dev-itpro/user-interface/build-extensible-control but didnt found an answer to my questions.

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Martin Dráb 240,835 Most Valuable Professional on at

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You aren't allowed to change objects in Microsoft packages, such as Application Foundation (where CalendarControl is defined). You can only create new objects (either independent ones or extensions) in your own packages. Therefore you can create your own calendar control, but if you want to change the standard one, you must ask Microsoft to do it.

Note that there F&O doesn't allow changes of resources (such as the .htm file) through extensions.
DerSascha 77 on at

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One more question. How can I use a custom created control as a lookup? Do I have to put the control on a form and use this form as a lookup form?
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Martin Dráb 240,835 Most Valuable Professional on at

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Yes, I think you need to create a lookup form. Then you can, for example, put it to FormHelp property of an EDT to get your lookup form used for controls with this data type.

For example, WHSImplementationTaskLinkLookup form uses a tree control instead of the usual grid, and it's linked to WHSImplementationAction EDT.