The device scene function of the API

Combinergn	Combine two areas into a new zone
Combinetransform	Drive the world to transform. It's equivalent to two conversions in sequence.
CreateCompatibleDC	Create a memory device scenario that is consistent with a specific device scenario
CreateDC	Create a device scene for a specialized device
CreateEllipticRgn	Create an Ellipse
CreateEllipticRgnIndirect	Creates an elliptical region that is tangent to a particular rectangle
CreateIC	Create an information scene for a dedicated device
CreatePolygonRgn	Create an area surrounded by a series of dots
CreatePolyPolygonRgn	Creates a region that is made up of multiple polygons. Each polygon should be closed
CreateRectRgn	Create a rectangular area
CreateRectRgnIndirect	Create a rectangular area
CreateRoundRectRgn	Create a rounded Rectangle
DeleteDC	Remove a dedicated device scenario or information scenario, releasing all relevant window resources
Dptolp	Converts a dot matrix from device coordinates to a dedicated device scene logical coordinate
Equalrgn	Determine whether two zones are equal
Excludecliprect	Removes a rectangular area from the clipping area of a dedicated device scene. Cannot draw within a rectangle
ExcludeUpdateRgn	Remove the refresh area of the specified window from the dedicated device scene clipping area
Extcreateregion	Modify the region according to the world transformation
Extselectcliprgn	Combines the specified range into the current clipping area of the device scene
Fillrgn	Fills the specified range with the specified brush
Framergn	Draws an outer frame around the specified area with the specified brush
Getboundsrect	Gets the bounding rectangle for the specified device scene
Getclipbox	Gets the smallest rectangle that fully contains the specified device scene trim area
Getcliprgn	Get device scene current clipping area
GetDC	Gets the device scene for the specified window
GetDCEx	Gets the device scene for the specified window. This function provides more options than GetDC
Getdcorgex	Gets the location of the specified device scene starting point (represented in screen coordinates)
GetDeviceCaps	Returns information based on the capabilities of the device represented by the specified device scenario
Getgraphicsmode	Determines whether to allow enhanced graphics mode (World conversion)
Getmapmode	Adjust the image mode for a specific device scene
Getregiondata	Loads a rgndata structure or buffer that describes a region's information
Getrgnbox	Gets the smallest rectangle that fully contains the specified range
Getupdatergn	Determines the refresh area for the specified window. The range is currently invalid and needs to be refreshed
Getviewportextex	Get device Scene viewport (viewport) range
Getviewportorgex	Get device Scene viewport start
GetWindowDC	Get the device scene for the entire window (including borders, scroll bars, title bars, menus, and so on)
Getwindowextex	Gets the window range for the specified device scene
Getwindoworgex	Gets the starting point of the logical window for the specified device scenario
Getwindowrgn	Get window Area
Getworldtransform	If there is a world conversion, get the current world transformation for the device scene
IntersectClipRect	Defines a new clipping area for the specified device
InvalidateRgn	Causes the window to specify that the area is inactive and adds it to the window refresh area so that it can then be repaint
Invertrgn	Reverses the device scene specified area by reversing each pixel value
Lptodp	Converts a dot matrix from a specified device scene logical coordinate to a device coordinate
Modifyworldtransform	Modifies the world transformation according to the specified pattern
Offsetcliprgn	Translates the device scene clipping area by a specified amount
Offsetrgn	Translates the specified range by the specified offset
Offsetviewportorgex	Translation device Scene viewport area
Offsetwindoworgex	To pan the starting point of the specified device scene window
Paintrgn	Fills the specified range with the current brush background color
PtInRegion	Determine if the point is within the specified range
Ptvisible	Determines whether the specified point is visible (that is, whether the point is in the device scene clipping area)
Rectinregion	Determines whether a rectangle has a portion in the specified range
Rectvisible	Determines whether a specified rectangle is partially visible (whether in the device scene clipping area)
ReleaseDC	Frees the specified device scene obtained by the calling GetDC or GETWINDOWDC function
RestoreDC	Restore a previously saved device scene from the device scenario stack
SaveDC	Saves the specified device scenario state to the Windows device scene stack
Scaleviewportextex	Scale the scope of the device scene viewport
Scalewindowextex	Scales the specified Device scene window range
ScrollDC	Scrolls the rectangle horizontally and/or vertically in a window (represented by a device scene)
SelectClipRgn	Select a new clipping area for the specified device scene
Setboundsrect	Sets the bounding rectangle for the specified device scene
SetGraphicsMode	Allow or disable enhanced graphics mode to provide some support (including world conversions)
Setmapmode	Sets the mapping mode for the specified device scenario
Setrectrgn	Sets the range to the specified rectangle
Setviewportextex	Set the device scene viewport range
Setviewportorgex	Set the device scene viewport starting point
Setwindowextex	Set the specified Device Scene window range
Setwindoworgex	Sets the starting point for the specified device scene window
SetWindowRgn	Set the window area
Setworldtransform	Setting up the world transformation
ValidateRgn	Activates the specified area in the window and removes it from the refresh area
Windowfromdc	Retrieve a handle to a window associated with a device scene