How to simulate the asynchronous scene of GetDefaultPrinter?

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youqiang_wu

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reference:

GetDefaultPrinter function (Winspool.h) - Win32 apps

This is a blocking or synchronous function and might not return immediately. How quickly this function returns depends on run-time factors such as network status, print server configuration, and printer driver implementation factors that are difficult to predict when writing an application. Calling this function from a thread that manages interaction with the user interface could make the application appear to be unresponsive.


so how should i simulate the asynchronous scene of GetDefaultPrinter?

i try many times in my pc , it always return immediately!

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