KeyView 24.4
KeyView Viewing SDK Programming Guide

# VAPIMWP_VIEW_CANINCREASEFONT

Determines whether the document font can be increased. If `lpbCanIncreaseFont` is `TRUE`, the font size can be increased by using the VAPIMWP_VIEW_INCREASEFONT message. This is a parameter of the `VAPIM_VIEW` message.

## Syntax

    #include <kvvapi.h>
    SendMessage(hWndVAPI, VAPIM_VIEW,VAPIMWP_VIEW_CANINCREASEFONT,
               (LPARAM) (BOOL*) lpbCanIncreaseFont );

## Arguments

Argument | Description
--- | ---
`hWndVAPI` | The handle of the VAPI window.
`lpbCanIncreaseFont` | A pointer to a flag that returns `TRUE` or `FALSE`, depending on whether the document font size can be increased.

## Returns

- `SendMessage()` returns `TRUE` if the call succeeds, in which case `lpbCanIncreaseFont` 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 `lpbCanIncreaseFont` is undefined.

## Discussion

Use this message to control the state of an Increase Font menu item or toolbar button.

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Version 24.4 | Last updated September 2024

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Product: IDOL KeyView 24.4

Topic Title: VAPIMWP_VIEW_CANINCREASEFONT