CommonControls (Replacement of the MS common controls)

[Eduardo-]

Eduardo, Krool is right.
In here, it also happens with your example.

Ah, now I think that you mean that it happens to the standard VB TextBox when the focus comes from a Krool's TexBoxW.
I didn't test that.

I tested just with a CommandButton and an UserControl, and it doesn't happen.

Not always.

Only when the click is long. May be VB checks that if the click doesn't pass the double click time, then it preserves the selection, always (at least here in my machine).