Form widths don't add up?

[mjb3030]

Why is it that when I have a parent form and I try to align a child form to its right edge, it overlaps by a few pixels and I get a horizontal scroll bar? I am aligning it in this way:

 

frmChild.location = new point(frmParent.clientsize.width - frmChild.width , 0)

 

That should put it in the upper left corner. It does, but it overlaps the edge and gives me a horizontal scrollbar in the parent form. So, I wind up having to subtract a few pixels from the LEFT coordinate in order to make it fit properly. Am I doing something wrong?

[mjb3030]

Correction... I meant that should put it in the upper right corner.

[Volte]

You need to take into account the border.

 

frmChild.location = New point(frmParent.clientsize.width - frmChild.width - (SystemInformation.BorderSize.Width * 4), 0)

[mjb3030]

Thank you. Why is it that you multiply that by 4?

[Volte]

One for each vertical border - two on the MDI form, two on the child form.

[mjb3030]

Gotcha. Thanks.