Access 2007: Command Box VBA code to pass on contents of one field in form1 to another field in form2

Hello, I am attaching the database to this question, but perhaps it won't be needed for some of the experts here.
Basically, I have a form (frmPtCharacteristics) with many forms which describe characteristics of it (i.e. groups present in the form, disease information etc...).  I've attached an image of the database relationships here as well.  I have tried to make the form normal and relate each table to the necessary keys.  

 test
On the main form there are several boxes (Groups, Race, Ages, Disease, Site/Category) displayed horizontally.  Currently, when the user clicks one of this the current form will close and it will open the selected form.  However, I want to pass on the [Call Number] (listed as 'record number' in label).
So for example, someone clicks the Groups command button when on record number 0001 in the frmPtCharacteristics.  The frmGroup should now ONLY let the user enter information pertaining to record number 0001.  Similarly, if someone selects the Race button they should only be able to enter information about groups belonging to the parent call number ([tblPtCharacteristics.[Call Number] is related to tblGroup.[Call Number] and  tblGroup.[GroupNumber] is related to tblRaceDesc.[Group Number])
How would I go about setting these controls to the command button in VBA?


EE-example-relationships.bmp
BevosAsked:
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Rey Obrero (Capricorn1)Connect With a Mentor Commented:
there are two options in the docmd.OpenForm command line that you can use

docmd.OpenForm(FormName, View, FilterName, WhereCondition, DataMode, WindowMode, OpenArgs)


* Where condition

WhereCondition   Optional Variant. A string expression that's a valid SQL WHERE clause without the word WHERE.

docmd.OpenForm "formname",,,"[Call Number]=" & ControlName

* openArgs

docmd.OpenForm "formname",openArgs:=Me.ControlName

OpenArgs   Optional Variant. A string expression. This expression is used to set the form's OpenArgs property. This setting can then be used by code in a form module, such as the Open event procedure. The OpenArgs property can also be referred to in macros and expressions.

For example, suppose that the form you open is a continuous-form list of clients. If you want the focus to move to a specific client record when the form opens, you can specify the client name with the openargs    argument, and then use the FindRecord method to move the focus to the record for the client with the specified name.

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