The MsiOpenPackageEx function opens a package to use with functions that access the product database. The MsiCloseHandle function must be called with the handle when the handle is no longer needed.

C# Signature:

[DllImport("msi.dll", CharSet = CharSet.Unicode, PreserveSig = true, SetLastError = true, ExactSpelling = true)]
public static extern UInt32 MsiOpenPackageExW(string szPackagePath, UInt32 dwOptions, ref IntPtr hProduct);

[DllImport("msi.dll", CharSet = CharSet.Unicode, PreserveSig = true, SetLastError = true, ExactSpelling = true)]

public static extern UInt32 MsiOpenPackageExW(string szPackagePath, UInt32 dwOptions, void **hProduct);

User-Defined Types:

None.

Alternative Managed API:

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Notes:

dwOptions: MSIOPENPACKAGEFLAGS_IGNOREMACHINESTATE = 1

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Documentation

MsiOpenPackageEx on MSDN

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