selextText doesn't work when open a form from another form

M

Mancha

Hello,

I have a form. From this form I open another form per button. Now, I
will select text in a richtext field with the command selectText. But
it doesn't works. The error is invalid parameters. If I select text
with selectText in the existing opening form, it works fine.
I implemented this in C#.
 
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