@msdn=http://search.microsoft.com/search/results.aspx?qu=$$$ @pinvoke=http://pinvoke.net/$$$.htm Summary: TODO - a short description !!!!C# Signature: [DllImport("Msi.dll", SetLastError = true)] static extern uint MsiGetPatchInfoEx( String szPatchCode, String szProductCode, String szUserSid, //pass 'null' to omit. MSIINSTALLCONTEXT dwContext, String szProperty, [Out] StringBuilder lpValue, ref uint pcchValue ); !!!!VB Signature: Declare Function MsiGetPatchInfoEx Lib "msi.dll" (TODO) As TODO !!!!User-Defined Types: None. !!!!Alternative Managed API: Do you know one? Please contribute it! !!!!Notes: None. !!!!Tips & Tricks: Please add some! !!!!Sample Code: const uint CURRENT_USER_SID = 0; const string INSTALLPROPERTY_INSTALLDATE = "InstallDate"; // string value from MSDN uint pcchValue = 1024*1024; StringBuilder returnValue = new StringBuilder((int)pcchValue); uint rv; rv = MsiGetPatchInfoEx( patch_id, product_id, CURRENT_USER_SID, MSIINSTALLCONTEXT.Machine, // defined below INSTALLPROPERTY_INSTALLDATE, returnValue, ref pcchValue ); /// private string TranslateMsiError(int msiError) { switch (msiError) { case 5 : return Resources.MsiErrorAccessDenied ; case 1610: return Resources.MsiErrorBadConfiguration ; case 1627: return Resources.MsiErrorFunctionFailed ; case 87: return Resources.MsiErrorInvalidParameter ; case 234: return Resources.MsiErrorMoreData ; case 0: return Resources.MsiErrorSuccess ; case 1605: return Resources.MsiErrorUnknownProduct ; case 1608: return Resources.MsiErrorUnknownProperty ; case 1647: return Resources.MsiErrorUnknownPatch ; default: break; } return Resources.AgentErrorUnknown; } enum MSIINSTALLCONTEXT { // Query that is extended to all per–user-managed installations for the users that szUserSid specifies. UserManaged= 1, // Query that is extended to all per–user-unmanaged installations for the users that szUserSid specifies. UserUnmanaged=2, // Query that is extended to all per-machine installations. Machine=4 } Documentation: MsiGetPatchInfoEx@msdn on MSDN
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