MsiGetUserInfo Implementation

[yenpei]

Hi,

I am trying to retrieve Product ID from the registry using the code
below:
<DllImport("msi.dll", EntryPoint:="MsiGetUserInfo",
SetLastError:=True, CharSet:=CharSet.Auto)> _
Public Function GetUserInfo( _
ByVal ProductCode As String, _
ByVal UserName As String, _
ByRef UserNameLen As Long, _
ByVal OrgName As String, _
ByRef OrgNameLen As Long, _
ByVal PID As String, _
ByRef PIDLen As Long) As
USERINFOSTATE

End Function

Public Enum USERINFOSTATE
USERINFOSTATE_MOREDATA = -3
USERINFOSTATE_INVALIDARG = -2
USERINFOSTATE_UNKNOWN = -1
USERINFOSTATE_ABSENT = 0
USERINFOSTATE_PRESENT = 1
End Enum

' Get Product ID (Serial Number)
Dim s As USERINFOSTATE
Dim user As String = "as"
Dim userlen As Long = 100
Dim org As String = "as"
Dim orglen As Long = 100
Dim productserial As String = "as"
Dim productseriallen As Long = 100

s =
Me.MsiGetUserInfo("{1DAA493C-2EFD-41CB-90AD-4EA886864BF9}", user,
userlen, org, orglen, productserial, productseriallen)

If s = USERINFOSTATE.USERINFOSTATE_PRESENT Then
ProductID = productserial
End If
However, at compile time, I got the following error message:

An unhandled exception of type 'System.InvalidProgramException'
occurred in NextWave Doremi Cafe.exe

Additional information: Error: PInvoke item (field,method) must be
Static.
Question: Is there any other way to try to get the Product serial
number during installation time? I am trying to write this serial
number into other registry location.

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*-----------------------*

[Cor Ligthert]

YenPei,

Is this for dotnet, because for dotnet is the registry class?

http://msdn.microsoft.com/library/de...classtopic.asp

I hope this helps?

Cor

[Mattias Sjögren]

<DllImport("msi.dll", EntryPoint:="MsiGetUserInfo",
SetLastError:=True, CharSet:=CharSet.Auto)> _
Public Function GetUserInfo( _
ByVal ProductCode As String, _
ByVal UserName As String, _
ByRef UserNameLen As Long, _
ByVal OrgName As String, _
ByRef OrgNameLen As Long, _
ByVal PID As String, _
ByRef PIDLen As Long) As
USERINFOSTATE

The Longs should be changed to Integers. I would also recommend using
StringBuilder instead of String for the output string parameters.

And finally, fo fix the compile error you get, you should make the
method Shared.

Mattias

--
Mattias Sjögren [MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
Please reply only to the newsgroup.

[yenpei]

Thanks. The StringBuilder works but I still keep the Long.

*-----------------------*
Posted at:
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*-----------------------*

[Mattias Sjögren]

but I still keep the Long.

Why? It's not correct.

Mattias

--
Mattias Sjögren [MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
Please reply only to the newsgroup.