The INSTALLUI_HANDLER_RECORD function prototype defines a callback function that the installer calls for progress notification and error messages. Call the MsiSetExternalUIRecord function to enable a record-base external user-interface (UI) handler.

Windows Installer 3.0 and Windows Installer 2.0:  Not supported. Available beginning with Windows Installer version 3.1 and later.

Syntax

INT CALLBACK InstalluiHandlerRecord(
    LPVOID pvContext,
    UINT iMessageType,
    MSIHANDLE hRecord
);

Parameters

pvContext

Pointer to an application context passed to the MsiSetExternalUIRecord function. This parameter can be used for error checking.

iMessageType

Specifies a combination of one message box style, one message box icon type, one default button, and one installation message type. This parameter must be one of the following.

Message box StylesFlag	Meaning
MB_ABORTRETRYIGNORE	The message box contains the Abort, Retry, and Ignore buttons.
MB_OK	The message box contains the OK button. This is the default.
MB_OKCANCEL	The message box contains the OK and Cancel buttons.
MB_RETRYCANCEL	The message box contains the Retry and Cancel buttons.
MB_YESNO	The message box contains the Yes and No buttons.
MB_YESNOCANCEL	The message box contains the Yes, No, and Cancel buttons.

 

Message box IconTypesFlag	Meaning
MB_ICONEXCLAMATION, MB_ICONWARNING	An exclamation point appears in the message box.
MB_ICONINFORMATION, MB_ICONASTERISK	The information sign appears in the message box.
MB_ICONQUESTION	A question mark appears in the message box.
MB_ICONSTOP, MB_ICONERROR, MB_ICONHAND	A stop sign appears in the message box.

 

Default ButtonsFlag	Meaning
MB_DEFBUTTON1	The first button is the default button.
MB_DEFBUTTON2	The second button is the default button.
MB_DEFBUTTON3	The third button is the default button.

 

Install message TypesFlag	Meaning
INSTALLMESSAGE_FATALEXIT	Premature termination
INSTALLMESSAGE_ERROR	Formatted error message
INSTALLMESSAGE_WARNING	Formatted warning message
INSTALLMESSAGE_USER	User request message.
INSTALLMESSAGE_INFO	Informative message for log
INSTALLMESSAGE_FILESINUSE	List of files currently in use that must be closed before being replaced
INSTALLMESSAGE_RESOLVESOURCE	Request to determine a valid source location
INSTALLMESSAGE_RMFILESINUSE	List of files currently in use that must be closed before being replaced. Available beginning with Windows Installer version 4.0. For more information about this message see Using Restart Manager with an External UI.
INSTALLMESSAGE_OUTOFDISKSPACE	Insufficient disk space message
INSTALLMESSAGE_ACTIONSTART	Start of action message. This message includes the action name and description.
INSTALLMESSAGE_ACTIONDATA	Formatted data associated with the individual action item.
INSTALLMESSAGE_PROGRESS	Progress gauge information. This message includes information on units so far and total number of units.
INSTALLMESSAGE_COMMONDATA	Formatted dialog information for user interface.
INSTALLMESSAGE_INITIALIZE	Sent prior to UI initialization, no string data
INSTALLMESSAGE_TERMINATE	Sent after UI termination, no string data
INSTALLMESSAGE_SHOWDIALOG	Sent prior to display of authored dialog or wizard
INSTALLMESSAGE_INSTALLSTART	Sent prior to installation of product.
INSTALLMESSAGE_INSTALLEND	Sent after installation of product.

 

The following defaults should be used if any of the preceding messages are missing: MB_OK, no icon, and MB_DEFBUTTON1. There is no default installation message type; a message type is always specified.

hRecord

Specifies a handle to the record object. For information about record objects, see the Record Processing Functions.

Return Value

-1

An error was found in the message handler. Windows Installer ignores this returned value.

0

No action was taken.

The following return values map to the buttons specified by the message box style:

IDOK IDCANCEL IDABORT IDRETRY IDIGNORE IDYES IDNO

Remarks

This type of external UI handler should be used when it is known what type of errors or messages the caller is interested in, and wants to avoid the overhead of parsing the string message that is sent to an external UI handler of INSTALLUI_HANDLER type, but retrieve the data of interest from fields of hRecord.

For more information on returning values from an external user interface handler, see the Returning Values from an External User Interface Handler topic. The hRecord object sent to the record-based external UI handler is owned by Windows Installer and is valid only for the callback's lifetime. The callback should extract from the record any data it needs and it should not close that handle.

Any attempt by a record-based external UI handler to alter the data in the hRecord object will be ignored by Windows Installer.

For more information about using a record-based external handler, see Monitoring an Installation Using MsiSetExternalUIRecord.

Requirements

See Also

MsiSetExternalUI

Not Supported in Windows Installer 3.0 and earlier

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Build date: 11/12/2009