MsiDoAction

MsiDoAction is used in Basic Msi type projects, where we are not having events like OnFirstUiBefore like we have in Installscript based projects. To call a custom action, we need to use this function.


The MsiDoAction function executes a built-in action, custom action, or user-interface wizard action.
Syntax

UINT MsiDoAction(
  __in  MSIHANDLE hInstall,
  __in  LPCTSTR szAction
);
Parameters:
hInstall [in]
Handle to the installation provided to a DLL custom action or obtained through MsiOpenPackage, MsiOpenPackageEx, or MsiOpenProduct.

szAction [in]
Specifies the action to execute.

Return Value:
ERROR_FUNCTION_FAILED
The function failed.

ERROR_FUNCTION_NOT_CALLED
The action was not found.

ERROR_INSTALL_FAILURE
The action failed.

ERROR_INSTALL_SUSPEND
The user suspended the installation.

ERROR_INSTALL_USEREXIT
The user canceled the action.

ERROR_INVALID_DATA
A failure occurred while calling the custom action.

ERROR_INVALID_HANDLE
An invalid or inactive handle was supplied.

ERROR_INVALID_HANDLE_STATE
The handle state was invalid.

ERROR_INVALID_PARAMETER
An invalid parameter was passed to the function.

ERROR_MORE_DATA
The action indicates that the remaining actions should be skipped.

ERROR_SUCCESS
The function succeeded.

The MsiDoAction function executes the action that corresponds to the name supplied. If the name is not recognized by the installer as a built-in action or as a custom action in the CustomAction table, the name is passed to the user-interface handler object, which can invoke a function or a dialog box. If a null action name is supplied, the installer uses the upper-case value of the ACTION property as the action to perform. If no property value is defined, the default action is performed, defined as "INSTALL".

Actions that update the system, such as the InstallFiles and WriteRegistryValues actions, cannot be run by calling MsiDoAction. The exception to this rule is if MsiDoAction is called from a custom action that is scheduled in the InstallExecuteSequence table between the InstallInitialize and InstallFinalize actions. Actions that do not update the system, such as AppSearch or CostInitialize, can be called.