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Reference for unit 'Controls' (#lcl)

TControl.ParentFormHandleInitialized

ParentFormHandleInitialized - called by ChildHandlesCreated of parent form

Declaration

Source position: controls.pp line 1186

protected procedure TControl.ParentFormHandleInitialized; virtual;

The form is a real connection to the target screen.

For example, the gtk under X gathers some screen information, but not before form creation.

But this information is needed to create DeviceContexts, which are needed to calculate Text Size and such stuff needed for AutoSizing.

That's why AdjustSize delays AutoSizing till this moment.

Now do the AutoSize.