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[Communication] [DllImport("user32.dll")] and extern usage in C#

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Posted on 2/7/2019 9:07:13 PM | | |
1. The extern modifier is used to declare methods implemented externally. A common use of the extern modifier is when calling in unmanaged code using the Interop service, with the DllImport feature. In this case, the method must also be declared as static. 2. The difference between introducing a DLL through DllImport and adding a DLL in a VS project is that DllImpor is for unmanaged ones, and unmanaged refers to DLLs generated without using .net; References are for hosting.




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