How change this target

Hello, I hope you can help me, I want to increase the image quality, could you guide me please.
Direct3D 9 render target is actually (-0.5,-0.5) to (639.5,359.5), increase the image quality, how could I?

[Cameron Nichols]

Hi Alejandro,

You should set your render target size to 639x359 to optimise scaling, the -0.5 pixel border is not visible. You should set this size either in Xaml definition in WPF or .Designer.cs in WinForms.

Regards
Cameron