/// <summary>
/// For each product listed by the patch package as eligible to receive the patch, ApplyPatch invokes
/// an installation and sets the PATCH property to the path of the patch package.
/// </summary>
/// <param name="patchPackage">path to the patch package</param>
/// <param name="installPackage">path to the product to be patched, if installType
/// is set to <see cref="InstallType.NetworkImage"/></param>
/// <param name="installType">type of installation to patch</param>
/// <param name="commandLine">optional command line property settings</param>
/// <exception cref="InstallerException">There was an error applying the patch</exception>
/// <remarks><p>
/// The <see cref="RebootRequired"/> and <see cref="RebootInitiated"/> properties should be
/// tested after calling this method.
/// </p><p>
/// Win32 MSI API:
/// <a href="http://msdn.microsoft.com/library/en-us/msi/setup/msiapplypatch.asp">MsiApplyPatch</a>
/// </p></remarks>
public static void ApplyPatch(string patchPackage, string installPackage, InstallType installType, string commandLine)
{
uint ret = NativeMethods.MsiApplyPatch(patchPackage, installPackage, (int)installType, commandLine);
Installer.CheckInstallResult(ret);
}
