As explained, the SubReport
item serves as a placeholder, thus it takes the dimensions of its child report. The report itself however cannot have rounded corners due to the reasons outlined in the previous post. Your best bet would be to match the background colors of the main and detail reports and try to simulate rounded corners for the detail report by using PictureBox
items with same background color docked at its left, top, right and bottom corners as shown in the referenced thread in previous post.
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