>>I have a form whose windowtype property is set to 1 = modal.
>>However, when it is displayed using DO FORM, it always becomes modeless, its windowtype property = 0.
>
>Check your ShowWindow property. If it is equal to 2 - As Top Level form, WindowType is ignored. Top level forms are always Modeless.

Yes it was set to 2.
I also tried it set to 1 - In top level form, and it has the same problem.
The parent form's ShowWindow setting is 2 - is that why?