Strange mouse cursor behavior

[tomik2476]

Hello, I have a problem with mouse cursor behavior in one delphi form. Normally the cursor shape changes between arrow and beam depending on whether it's hovering over some component or just over the form. Also on the edges of the form it changes into vertical arrows to indicate the possibility of resize.
But when I click on editbox placed on the form, this editbox receives the focus but it's unable to write into it. The mouse cursor is frozen into beam shape "I" regardless whether it's over component, form, or form's edge. Hints are displaying well. This is hapenning just sometimes, but not always. This behavior stops when I click again someplace on the form or when I switch to another window (Alt-Tab) and back.

I may not be specific Delphi bug. But what confuses me is that I have several forms descended from common ancestor and this bug appears only on one of these forms.

Thanks for any advice,
Tom

 

[Glenn9999]

Are you sure you don't have the edit box disabled or set to read-only?

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Measurement is not management.

 

[tomik2476]

Yes, I am sure. I can only guess there's some bug between Delphi and WinAPI or something like that. But I really don't know.