How can I check if a Form is already open

[ricardolb]

I'm opening all my forms in TabSheets, just like the UniGUI demo, but sometimes, inside another form I also open a form for search records and stuff, but, if this form is already open in a TabSheet, it won't do anything, is there a way I can check if this form is already open, so I can close the tabsheet and open the form modal.

 

Thank you

[RobYost]

I usually create my forms 

aForm = TmyForm.Create(self);

when you do it this way you can check 

if (aForm = nil) then

if you don't do it this way you can check

if (aForm.Visible) then

[ricardolb]

I'll try that, thank you