This Access tutorial explains how to hide Subreport if no data.
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Hide Access Subreport if no data
Assume that you have a Master Report called Report A, the figures are displayed in Group Header.
Now you have a Subreport called B and you want to display data for each Group Header. Drag Report B to A and define the joined Fields.
As you insert B into A, the height of the section expanded significantly.
The problem it is that the actual height Group Header is expanded, because you have involuntarily adjusted the Group Header height.
Solution to hide Subreport if no data
In the Master Report, select the Subreport, change the Height Property to 0 (Alternatively set Can Shrink Property to Yes).
Then change the Can Grow Property to Yes.
Now if Subreport contains any data, the height is automatically expanded, otherwise Subreport will be invisible as below.
VBA Solution to hide Subreport if no data
You can also hide Subreport in VBA using Visible Property, but you still need to set the Height Property of Subreport to 0 beforehand (or set Can Shrink Property to Yes).
Insert the following code in an Event of Master Report.
Me.SubReportControl.Visible = Me.SubReportControl.Report.HasData
Note that SubReportControl is the Control name of Subreport in Master report, not the actual Subreport name.
Outbound References
http://www.access-programmers.co.uk/forums/showthread.php?t=212478