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.
9/6/2012 4:51:30 AM - hypersw-194.8.164.162
Closes an open installation handle.
9/25/2009 12:31:50 PM - 84.126.63.30
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public static extern UInt32 MsiOpenPackageExW(string szPackagePath, UInt32 dwOptions, void **hProduct);