Problem using WinVerifyTrust Function

VB_al 91 Reputation points
2021-02-04T18:04:08.69+00:00

Visual Basic .NET Framework

Hello, as @Drake Wu - MSFT said, I used WinVerifyTrust but
when I code
dim Result as long = WinVerifyTrust(........)
if result = 0 then
'verified successfully
else
'not verified
end if

it throws an exception: MarshalDirectiveException

I don't know ho to solve and i think i code GUID , pointer. . . . correctly..

Thanks

Windows API - Win32
Windows API - Win32
A core set of Windows application programming interfaces (APIs) for desktop and server applications. Previously known as Win32 API.
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  1. Drake Wu - MSFT 991 Reputation points
    2021-02-05T02:24:24.053+00:00

    Hi, @VB_al MarshalDirectiveException seems to be caused by the calling convention of the function. The calling convention of WinVerifyTrust is the __stdcall:
    64270-1.png
    You can try to explicitly declare as CallingConvention = CallingConvention.StdCall. If this still does not solve the problem, please provide your sample which shows how you declare all the types and functions.


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