Edit

Share via


Desktop Window Manager (DWM)

Overview of the Desktop Window Manager (DWM) technology.

To develop Desktop Window Manager (DWM), you need these headers:

For programming guidance for this technology, see:

Enumerations

 
DWM_SHOWCONTACT

Specifies the input operations for which visual feedback should be provided.
DWM_SOURCE_FRAME_SAMPLING

Flags used by the DwmSetPresentParameters function to specify the frame sampling type.
DWM_SYSTEMBACKDROP_TYPE

Flags for specifying the system-drawn backdrop material of a window, including behind the non-client area.
DWM_TAB_WINDOW_REQUIREMENTS

This enumeration supported an experimental feature that was never implemented in Windows. It has no effect and should not be used.
DWM_WINDOW_CORNER_PREFERENCE

The DWM_WINDOW_CORNER_PREFERENCE enumeration (dwmapi.h) specifies the rounded corner preference for a window.
DWMFLIP3DWINDOWPOLICY

Flags used by the DwmSetWindowAttribute function to specify the Flip3D window policy.
DWMNCRENDERINGPOLICY

Flags used by the DwmSetWindowAttribute function to specify the non-client area rendering policy.
DWMTRANSITION_OWNEDWINDOW_TARGET

Identifies the target.
DWMWINDOWATTRIBUTE

Flags used by the DwmGetWindowAttribute and DwmSetWindowAttribute functions.
GESTURE_TYPE

Identifies the gesture type specified in DwmRenderGesture.

Functions

 
DwmAttachMilContent

This function is not implemented. (DwmAttachMilContent)
DwmDefWindowProc

Default window procedure for Desktop Window Manager (DWM) hit testing within the non-client area.
DwmDetachMilContent

This function is not implemented. (DwmDetachMilContent)
DwmEnableBlurBehindWindow

Enables the blur effect on a specified window.
DwmEnableComposition

Enables or disables Desktop Window Manager (DWM) composition.
DwmEnableMMCSS

Notifies the Desktop Window Manager (DWM) to opt in to or out of Multimedia Class Schedule Service (MMCSS) scheduling while the calling process is alive.
DwmExtendFrameIntoClientArea

Extends the window frame into the client area.
DwmFlush

Issues a flush call that blocks the caller until the next call to a Present method, when all of the Microsoft DirectX surface updates that are currently outstanding have been made. This compensates for very complex scenes or calling processes with very low priority.
DwmGetColorizationColor

Retrieves the current color used for Desktop Window Manager (DWM) glass composition.
DwmGetCompositionTimingInfo

Retrieves the current composition timing information for a specified window.
DwmGetGraphicsStreamClient

This function is not implemented. (DwmGetGraphicsStreamClient)
DwmGetGraphicsStreamTransformHint

This function is not implemented. (DwmGetGraphicsStreamTransformHint)
DwmGetTransportAttributes

Retrieves transport attributes.
DwmGetUnmetTabRequirements

This function was part of an experimental feature that was never implemented in Windows. It has no effect and should not be used.
DwmGetWindowAttribute

Retrieves the current value of a specified Desktop Window Manager (DWM) attribute applied to a window.
DwmInvalidateIconicBitmaps

Called by an application to indicate that all previously provided iconic bitmaps from a window, both thumbnails and peek representations, should be refreshed.
DwmIsCompositionEnabled

Obtains a value that indicates whether Desktop Window Manager (DWM) composition is enabled. Applications on machines running Windows 7 or earlier can listen for composition state changes by handling the WM_DWMCOMPOSITIONCHANGED notification.
DwmModifyPreviousDxFrameDuration

Changes the number of monitor refreshes through which the previous frame will be displayed. DwmModifyPreviousDxFrameDuration is no longer supported. Starting with Windows 8.1, calls to DwmModifyPreviousDxFrameDuration always return E_NOTIMPL.
DwmQueryThumbnailSourceSize

Retrieves the source size of the Desktop Window Manager (DWM) thumbnail.
DwmRegisterThumbnail

Creates a Desktop Window Manager (DWM) thumbnail relationship between the destination and source windows.
DwmRenderGesture

Notifies Desktop Window Manager (DWM) that a touch contact has been recognized as a gesture, and that DWM should draw feedback for that gesture.
DwmSetDxFrameDuration

Sets the number of monitor refreshes through which to display the presented frame. DwmSetDxFrameDuration is no longer supported. Starting with Windows 8.1, calls to DwmSetDxFrameDuration always return E_NOTIMPL.
DwmSetIconicLivePreviewBitmap

Sets a static, iconic bitmap to display a live preview (also known as a Peek preview) of a window or tab. The taskbar can use this bitmap to show a full-sized preview of a window or tab.
DwmSetIconicThumbnail

Sets a static, iconic bitmap on a window or tab to use as a thumbnail representation. The taskbar can use this bitmap as a thumbnail switch target for the window or tab.
DwmSetPresentParameters

Sets the present parameters for frame composition. DwmSetPresentParameters is no longer supported. Starting with Windows 8.1, calls to DwmSetPresentParameters always return E_NOTIMPL.
DwmSetWindowAttribute

Sets the value of Desktop Window Manager (DWM) non-client rendering attributes for a window.
DwmShowContact

Called by an app or framework to specify the visual feedback type to draw in response to a particular touch or pen contact.
DwmTetherContact

Enables the graphical feedback of touch and drag interactions to the user.
DwmTransitionOwnedWindow

Coordinates the animations of tool windows with the Desktop Window Manager (DWM).
DwmUnregisterThumbnail

Removes a Desktop Window Manager (DWM) thumbnail relationship created by the DwmRegisterThumbnail function.
DwmUpdateThumbnailProperties

Updates the properties for a Desktop Window Manager (DWM) thumbnail.

Structures

 
DWM_BLURBEHIND

Specifies Desktop Window Manager (DWM) blur-behind properties. Used by the DwmEnableBlurBehindWindow function.
DWM_PRESENT_PARAMETERS

Specifies Desktop Window Manager (DWM) video frame parameters for frame composition. Used by the DwmSetPresentParameters function.
DWM_THUMBNAIL_PROPERTIES

Specifies Desktop Window Manager (DWM) thumbnail properties. Used by the DwmUpdateThumbnailProperties function.
DWM_TIMING_INFO

Specifies Desktop Window Manager (DWM) composition timing information. Used by the DwmGetCompositionTimingInfo function.
MilMatrix3x2D

Specifies a 3x2 matrix that describes a transform.
UNSIGNED_RATIO

Defines a data type used by the Desktop Window Manager (DWM) APIs. It represents a generic ratio and is used for different purposes and units even within a single API.