Getting the return value of DPI function is always 96 | getting the return value of DPI function is incorrect | why the return value of getdpiformonitor/getdevicecaps is incorrect

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No matter how you adjust the system zoom , Use GetDpiForMonitor/GetDeviceCaps obtain DPI The return value of is always 96！

After searching the Internet, there is no correct solution , It took nearly an hour to figure out the reason ！

It is hereby posted for future generations ！

The reason is simple , In the previous test, you set high in the properties of the program DPI Set in the “ Program DPI” As a result of , high DPI Scaling overrides can also have an effect , See the figure for details ！

The solution goes without saying ！

GetScaleFactorForMonitor This function is not affected by the above settings , But this function only supports WIN10/WIN11 Such as system .