PhWindowQueryVisible

Gamma/Photon: Using Gamma™ with the Photon microGUIŽ, Version 4.0
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# `PhWindowQueryVisible`

`PhWindowQueryVisible` -- finds the visible extent of a window.

## Syntax

    PhWindowQueryVisible (flags, rid, input_group)

## Arguments

`flags`

  One of: query_graphics, query_input_group, query_exact, query_ig_pointer, query_ig_region.

`rid`

  The region id.

`input_group`

  The input group number.

## Returns

The area as a PhRect.

## Description

This function calculates the visible extent, based on the region type passed in `flag`, for every region intersecting with `rid`. One and only one `flag` must be set, but the `rid` can be 0.

The `input_group` should be the input_group field for an event, if there is any. Otherwise, use the value of the PHIG environment, if defined. If neither of these is available, use 1.

## See Also

In Photon documentation: PhWindowQueryVisible.

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