pinvoke.net: Edit: msi.MsiApplyPatch

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Summary: The MsiApplyPatch functions applies a patch to a installed product.

!!!!C# Signature:
 [DllImport("msi.dll", SetLastError=true)]
 static extern UInt32 MsiApplyPatch(string patchPackage, string installPackage, INSTALLTYPE installType, string commandLine);

!!!!VB Signature:
 Declare Function MsiApplyPatch Lib "msi.dll" (TODO) As TODO

!!!!User-Defined Types:
 enum INSTALLTYPE
 {
	INSTALLTYPE_DEFAULT = 0, // Searches system for products to patch. installPackage must be null
	INSTALLTYPE_NETWORK_IMAGE = 1, // Administrative installation
	INSTALLTYPE_SINGLE_INSTANCE = 2, // Patch product specified by installPackage
 }
!!!!Alternative Managed API:
Do you know one?  Please contribute it!

!!!!Notes:
!!!!Parameters
 patchPackage
   Full path to the patch package
 installPackage
   See User-Defined Types
 installType
   Type of installation. See User-Defined Types
 commandLine
   Specifies command line property settings

!!!!Tips & Tricks:
Please add some!

!!!!Sample Code:
 UInt32 ret = MsiApplyPatch("TestInstall.msp", "", INSTALLTYPE_DEFAULT, "REINSTALL=ALL REINSTALLMODE=omus REBOOT=Suppress");

Documentation: MsiApplyPatch@msdn on MSDN