Adjusting User Controls to fit different dpi settings.

Question

Hey,

I have an issue with a WinForms app I'm working on.  I've created a user control which contains some standard controls, and then placed that user control inside a tab control and window and set the Dock property to Fill.

My issue arises when I use my app on a different PC which has higher DPI setting than the standard 96.  So what happens when I try 120dpi is the Windows become larger (good), and all the text and buttons in the user control resize accordingly as well(good).  But the problem is that the space the User Control takes up is no longer the 'fill' area, and I get space around the bottom and right of the windows that doesn't get used.  I'll link two pictures that show what is happening.

Using Tab Control
Using Windows Form

Now how do I get my User Controls to fill the area?  I know I can resize the window itself to normal dimensions but then I still get the issue in the first picture where the buttons are too large and overlap.

Thanks for any Help you can offer!