Sorry if this is a little bit of a noob questions,  I have a Form (frm.a)
that has two subform (datasheet view, sub.a, sub.b).  I want to open a
additional form based on the active line in sub.a or sub.b.  as it links to
that data.

When I insert the command botton on the form it asks for the link for the
data, it only displays the frm.a controls, and the form I am opening
controls.  Is there a way to get it to link to the sub form controls?  Or am
I just going about this the wrong way?

Thanks