# Clipping user defined functions Reference

Below is a complete list of the user defined functions available in AutoIt. Click on a user defined function name for a detailed description.

When using them you need to add a #include <WinAPIGdi.au3>.

User Defined Function | Description
--- | ---
_WinAPI_ExcludeClipRect | Creates a new clipping region that consists of the existing clipping region minus the specified rectangle
_WinAPI_ExtSelectClipRgn | Combines the specified region with the current clipping region
_WinAPI_GetClipBox | Retrieves the dimensions of the bounding rectangle of the visible area
_WinAPI_GetClipRgn | Retrieves a handle identifying the current application-defined clipping region
_WinAPI_IntersectClipRect | Creates a new clipping region from the intersection of the current clipping region and the specified rectangle
_WinAPI_OffsetClipRgn | Moves the clipping region of a device context by the specified offsets
_WinAPI_PtVisible | Determines whether the specified point is within the clipping region
_WinAPI_RectVisible | Determines whether any part of the specified rectangle lies within the clipping region
_WinAPI_SelectClipPath | Selects the current path as a clipping region, combining the new region with any existing clipping region
_WinAPI_SelectClipRgn | Selects a region as the current clipping region for the specified device context