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You can't &quot;link&quot; directly to your query in the control source of your textbox. &nbsp;You need to lookup the value.<br />
<br />
This will give you the sum for the CourseID of the current record on your main form:<br />
<br />
=DLookUp(&quot;SommeDeFees&quot;,&quot;Su<wbr />mFeesForCo<wbr />urse&quot;,&quot;Cou<wbr />rseID = &quot;&nbsp;&amp; [CourseID])
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You can't "link" directly to your query in the control source of your textbox.  You need to lookup the value.

This will give you the sum for the CourseID of the current record on your main form:

=DLookUp("SommeDeFees","SumFeesForCourse","CourseID = " & [CourseID])

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Quick, Clear, Efficient: Thank you!
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Hello guys<br />
<br />
<br />
In a formular, frmCourseMain, I just want to add a textbox (SUM in red in the file) which contains the sum of the fees of the student registered for the course chosen.<br />
I made a simple request &nbsp;SumFeesOfCourse, and I dont know how to link this with the textbox in order to screen a correct result.<br />
I think my understanding of how to link is not proper...<br />
<br />
Thanks in advance for explanation!<br />
<br />
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example.mdb

Hello guys


In a formular, frmCourseMain, I just want to add a textbox (SUM in red in the file) which contains the sum of the fees of the student registered for the course chosen.
I made a simple request  SumFeesOfCourse, and I dont know how to link this with the textbox in order to screen a correct result.
I think my understanding of how to link is not proper...

Thanks in advance for explanation!


Add Sum to an item (see file)

Microsoft Access is a rapid application development (RAD) relational database tool. Access can be used for both desktop and web-based applications, and uses VBA (Visual Basic for Applications) as its coding language.

Microsoft Access

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