问题
I'm starting to test a Winforms (using VS2008) app on Windows 7, and am seeing a strange problem.
It ran fine on the first couple of Win7 installations, but on the next two, many of my dialogs are too small, clipping the content by about 30%.
The app was developed on WinXP, and have not seen this problem on any of the XP installations!
Just starting to investigate the problem - don't have any details on differences between the systems that work and those that don't yet.
Edit
According to Kate's comment to one of the answers, Win7 will sometimes change to a custom text size when a new monitor is installed. The machine with the problem has a big, widescreen monitor, and when we checked (Control Panel + Display + Custom Text Size) - sure enough - the custom text size was set to 125%. Setting it to 100% made the problem go away.
I was then able to replicate the problem on WinXP by setting the text size to 125%.
So the question now becomes - how do you ensure a Winforms app is "custom text size independent"?
/Edit
As suggested, here are some screen shots. 1st one is from a Windows 7 computer, 2nd one is from my WinXP development system.
回答1:
Although both screen DPI and Themes can change the size of controls, that is not the problem here because in your screen shots the window chrome and non-text control sizes are unchanged. The problem is you are not taking custom font sizes into account.
If you wanted to move controls around to fix them into a fixed form size you would have to perform calculations using the Control.AutoScaleDimensions property of your controls. That is a lot of work, don't do that.
Instead, lay out your controls using absolute coordinates and enlarge your form to contain the results. Set your forms' AutoScaleMode = AutoScaleMode.Font.
回答2:
I had the same issue when a Win 7 user adjusted the default font size in "Control Panel\All Control Panel Items\Display"
When you have forms set to "Fixed Dialog" set the following properties on your form: .AutoScaleMode=Font .AutoSize=True .AutoSizeMode=GrowOnly so windows can resize your form based on the sizes of the child elements.
回答3:
Display size, resolution, DPI, large fonts, small fonts are some possible causes.
来源：https://stackoverflow.com/questions/6983569/why-are-my-dialog-boxes-too-small-on-some-but-not-all-windows7-computers