UPDATE: I got it: The sytem menu must be enabled.
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Sergey,
I've tried

= sys(1500,"_MWI_CASCADE","_MWINDOW")

but didn't function in my application.
I've created a new test application and worked fine.
I thing I've disabled something in my application that
is not allowing this command to work.

>Check Cascade all VFP Forms Thread #896837
>
>>In my application, sometimes, users have to work
>>with multiple open forms. I want to provide an option
>>so they can organize them automatically (cascade,
>>side-by-side)? How can I achieve this?
>>Thanks in advance.