Error 0x80070261

Value: -2147024287 | 0x80070261 | 2147943009

What does it mean ?

ERROR_BAD_DLL_ENTRYPOINT  
{Invalid DLL Entrypoint} // The dynamic link library %hs is not written correctly. The stack pointer has been left in an inconsistent state. // The entrypoint should be declared as WINAPI or STDCALL. Select YES to fail the DLL load. Select NO to continue execution. Selecting NO may cause the application to operate incorrectly.
Value: 609 | 0x0261 | 0b0000001001100001

Where does it come from ?

FACILITY_WIN32  
Provides a way to handle error codes from functions in the Win32 API as an HRESULT. (Error codes in 16 - bit OLE that duplicated Win32 error codes have also been changed to FACILITY_WIN32)
Value: 7 | 0x007 | 0b00000111

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