I'm developing in Winforms with a .NET 4 profile in Visual Studio 2010 at Windows' 100% scaling (96dpi) on Windows 10.
As per the advice from this highly rated answer, I set dpiAware to true in the app.manifest file, set the AutoScaleMode of the main Form to Font, and since I have splitContainers in the Form, but they very unfortunately don't have an AutoScaleMode property in the Wysiwyg Designer, I also have to add these lines to the Designer.cs file:
*.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
*.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
This ensures that if the user happens to use Windows in 125%, 150% or even other scaling modes, then the GUI will resize properly, without some components being too small or too big.
Unfortunately, as per the advice of the aforementioned link: "Only the controls in the Controls lists when ResumeLayout at the end of InitializeComponent is called will be auto-scaled", which means I need to put the above two lines in the Designer.cs file. I can't simply put them later in the Form Load event.
Unfortunately, this means that whenever I update or move about a widget/button/label in the Wysiwyg editor, the Designer.cs file is automatically recreated, and I lose my two lines of code above. So I have to keep remembering to put them back in every time I update the GUI in the Wysiwyg editor.
The link also supplies a potential solution to avoid this ugliness by partially avoiding the use of the Wysiwyg editor, and instead creating the splitContainers programmatically in the Load event. I quote: "if you dynamically add controls, then you need to SuspendLayout(); AutoScaleDimensions = new SizeF(6F, 13F); AutoScaleMode = AutoScaleMode.Font; ResumeLayout(); on that control before you add it in".
The problem there is that I have a ton of splitContainer code to move over (such as objects being added to the splitContainers), and it will ruin the look of the Wysiwyg editor (I want to see my splitContainers thank-you-very-much as they are a crucial part of the GUI and have many elements/widgets inside that I also want to see when designing!).
My question is if I can get the best of both worlds: Keep the look of the splitContainers and contents in the Wysiwyg editor, while keeping the functionality of proper scaling by utilizing the two lines of code above (*.AutoScaleMode = ... and *.AutoScaleDimensions = ...) which seemingly must be in the Designer.cs file before *.ResumeLayout() is called.