You need to pass the form handle to the second form:

Form A:
DO FORM FormB WITH THISFORM

Form B:
Init():
LPARAMETERS toParentForm
THISFORM.ParentForm = toParentForm && Store the handle to a property to access it later

Release():
THISFORM.ParentForm.Enabled = .T.

HTH

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>I gave a name to my main form. When I call another form from this one, I disable it. When quitting the other form I can give an enable statement from the form I'm closing and I get the desired effect.
>When I put the name of the form in the watch I can see the whole object.
>
>I tried to use this same effect with another form in the same program, but I can't make it work. It gives the error that the object does not exist.