< are you creating a Windows Forms or Web Forms application? Is there a reason you're not using automatic data binding rather than manually storing retrieved data in your UI controls...or are you simply setting default values based on the selected vendor? How are you saving data? Are you calling a form-level method, using an MM .NET Save button or calling the business object directly?
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I'm creating a Windows Forms application in VB. All the controls are MM.

automatic data binding? The fields, like company name, address, etc., are bound to the table (pur_head) in my database. I followed the directions in creating these fields.

I want the user to pick a vendor and have the picked record populate the company name, address, etc. fields into my table. I don't just want a link to another table here.

I'm using the MM .NET Save button.

I'm not using any default values.

Like I said, the data row fields values are displayed in the text fields on the screen, but for some reason the data in these fields are not being saved unless you put the mouse cursor in the field and tab out.

Is this enough information?

Thanks.