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Asked: 2026-05-30T22:56:57+00:00

Ok, so I have this code written in C++ that call the function SetThreadDesktop

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Ok, so I have this code written in C++ that call the function SetThreadDesktop. I call this function from a dll when running as System user on Windows XP.

When called from a C# console application, the function succeeds, but when called from a VB.NET console application, it doesn’t. With GetLastError, I saw that the error message was this:

SetThreadDesktop failed with error 170: The requested resource is in use (translated from french)

How does it come that it works for a C# console app and not for a VB.NET one? Btw, it doesn’t work for a winform app neither. Can any .NET master explain this to me?
Is it a compiler option that I have to change?

Thanks

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1 Answer

  1. Editorial Team

    Try adding a <MTAThread> attribute on your (VB) Main method as explained here.

    That’s really the only thing that differs between C# and VB Console projects by default.

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