populate empty subform on open from form button with linked ID

[jedder]

Have a command button on form opening a subform


when subform opens it will be empty of data
I need to populate the ID field in the subform(which is the linked field) with the ID field data from the form that has opened it.
I'm thinking it's an OpenArg in the open event of the subform, but, unsure of how to code this.
Any help, much appreciated.

[June7]

A subform is a form that is on another form. Don't need a command button to open subform. It is open when the main form opens. Set Master/Child links properties of the subform container control. The related ID will automatically save when data entered into subform.

If this is actually an independent form then I suggest you explore form/subform arrangement.

[jedder]

A subform is a form that is on another form. Don't need a command button to open subform. It is open when the main form opens. Set Master/Child links properties of the subform container control. The related ID will automatically save when data entered into subform.

If this is actually an independent form then I suggest you explore form/subform arrangement.

I created it as a subform so I can link the ID fields as it will show on a main page when data is entered.
I need people to be able to open it only if needed to enter additional data into memo fields.
Since the ID is not populated yet til data is entered, the ID will not show. I don't want to have it manually entered.
Whatever version(be it form, sub, datasheet, etc.) I create of this, I need the ID field automatically populated on open.
Thanks for the response.

[June7]

What do you mean by 'additional data into memo fields'? Are you adding data to an existing record? Do you want to provide project for analysis?

[jedder]

What do you mean by 'additional data into memo fields'? Are you adding data to an existing record? Do you want to provide project for analysis?

On the main form, they are entering description and notes re:subject.
I want to be able for them to open up another form to add any additional descriptions/notes for that field.
That's why I want the form closed and only able to open from a button.
maybe I need to use a different way to enter this, I'm not sure.
The idea seems workable. The form is opening how I need it to...just not showing the ID on open.
Someone else mentioned it will populate after data entry and close.
Haven't tried yet. Will work on this tomorrow.
Thanks for input!