How can I hide MDI child windows?

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It works as easy as the following:

ShowWindow(MdiChild1.Handle, SW_HIDE);

In previous VCL and/or Windows versions, this caused problems as the following (dated) text shows. Thanks to Yaroslav Pasichnyk for pointing out that this document was outdated.

Old Text -no longer valid

You can't hide MDI children.
Windows does weird things when you try to hide
MDI children, so VCL doesn't permit it.

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