# VAPIMWP_VIEW_SETGRIDLINES

Sets the gridlines state of the document. This is a parameter of the `VAPIM_VIEW` message.

## Syntax

    #include <kvvapi.h>
    SendMessage(hWndVAPI, VAPIM_VIEW, VAPIMWP_VIEW_SETGRIDLINES,
               (LPARAM) (BOOL) bGridlines );

## Arguments

Argument | Description
--- | ---
`hWndVAPI` | The handle of the VAPI window.
`bGridlines` | A flag that is `TRUE` or `FALSE` to enable or disable the document gridlines.

## Returns

`SendMessage()` returns `TRUE` if the call succeeds; otherwise it returns `FALSE`.

## Discussion

Use this message to implement a Toggle Gridlines menu item or toolbar button.

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