# VAPIMWP_MULTIOBJ_CANMULTIOBJ

Determines whether the document contains multiple objects. See Change the Current Object in a Document. This is a parameter of the `VAPIM_MULTIOBJ` message.

## Syntax

    #include <kvvapi.h>
    SendMessage(hWndVAPI, VAPIM_MULTIOBJ,
                VAPIMWP_MULTIOBJ_CANMULTIOBJ,
               (LPARAM) (BOOL*) lpbCanMultiObj );

## Arguments

Argument | Description
--- | ---
`hWndVAPI` | The handle of the VAPI window.
`lpbCanMultiObj` | A pointer to a flag that returns `TRUE` or `FALSE`, depending on whether the document contains multiple objects.

## Returns

- `SendMessage()` returns `TRUE` if the call succeeds, in which case `lpbCanMultiObj` returns `TRUE` or `FALSE`.
- `SendMessage()` returns `FALSE` if the call fails (for example, if there are invalid arguments or if no document is open), in which case `lpbCanMultiObj` is undefined.

## Discussion

Use this message to control the state of a Next Object or Previous Object menu item or toolbar button.

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