DPI issue with winforms application

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C#

.NET4.6

I got a question about DPI issue with winforms applications.

I am having a winforms C# application, built with .NET 4.5.2 using VS 2013. Many of our customers are using Window 8 or 8.1 and Windows 10 and some of them are complaining about the DPI issue when they switch between laptop and big monitors. To solve this I have added the DPI Awareness section to my manifest file, but not solved the issue.

But still some issues are not solved. We could see issues with some user controls and also while creating OLE objects from our app to MS word (not getting the size of the objects properly).

I understand that this issue has been addressed with .NET 4.7 but unfortunately we don’t have a plan to upgrade this year. Could you please suggest some fixes or documents that I could follow to fix this? Thank you.

What I have tried:

Tried Manifest changes

<windowsSettings>

        <!-- Per Monitor V1 [OS >= Windows 8.1]

         Values: False, True, Per-monitor, True/PM -->

        <dpiAware xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">

          true/PM

        </dpiAware>

        <!-- Per Monitor V1 [OS >= Windows 10 Anniversary Update (1607, 10.0.14393, Redstone 1)]

         Values: Unaware, System, PerMonitor -->

        <!-- Per Monitor V2 [OS >= Windows 10 Creators Update (1703, 10.0.15063, Redstone 2)]

         Value: PerMonitorV2 -->

        <dpiAwareness xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">

          PerMonitorV2, PerMonitor

        </dpiAwareness>

</windowsSettings>