最近寫了個小程式，用於將固態硬碟的寫入量等信息顯示在任務欄，最開始使用Windows API也可以實現，但是當任務欄托盤增加的時候，會被遮蓋，最終採用了DeskBand來實現，填了很多坑。 參考的GitHub地址：https://github.com/dsafa/CSDeskBand DeskBan ...
最近寫了個小程式，用於將固態硬碟的寫入量等信息顯示在任務欄，最開始使用Windows API也可以實現，但是當任務欄托盤增加的時候，會被遮蓋，最終採用了DeskBand來實現，填了很多坑。
參考的GitHub地址：https://github.com/dsafa/CSDeskBand
DeskBand相關代碼如下：
COLORREF：
// This code snippet was used by SharpShell. // using System.Drawing; using System.Runtime.InteropServices; namespace MyDiskInfo.Interop { [StructLayout(LayoutKind.Sequential)] public struct COLORREF { public COLORREF(Color color) { Dword = (uint)color.R + (((uint)color.G) << 8) + (((uint)color.B) << 16); } public uint Dword; public Color Color { get { return Color.FromArgb( (int)(0x000000FFU & Dword), (int)(0x0000FF00U & Dword) >> 8, (int)(0x00FF0000U & Dword) >> 16); } } } }View Code
DESKBANDINFO：
using System; using System.Runtime.InteropServices; namespace MyDiskInfo.Interop { /// <summary> /// Receives information about a band object. This structure is used with the deprecated IDeskBand::GetBandInfo method. /// </summary> [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)] public struct DESKBANDINFO { /// <summary> /// Set of flags that determine which members of this structure are being requested. /// </summary> /// <remarks> /// This will be a combination of the following values: /// DBIM_MINSIZE ptMinSize is being requested. /// DBIM_MAXSIZE ptMaxSize is being requested. /// DBIM_INTEGRAL ptIntegral is being requested. /// DBIM_ACTUAL ptActual is being requested. /// DBIM_TITLE wszTitle is being requested. /// DBIM_MODEFLAGS dwModeFlags is being requested. /// DBIM_BKCOLOR crBkgnd is being requested. /// </remarks> public DBIM dwMask; /// <summary> /// Point structure that receives the minimum size of the band object. /// The minimum width is placed in the x member and the minimum height /// is placed in the y member. /// </summary> public POINT ptMinSize; /// <summary> /// Point structure that receives the maximum size of the band object. /// The maximum height is placed in the y member and the x member is ignored. /// If there is no limit for the maximum height, (LONG)-1 should be used. /// </summary> public POINT ptMaxSize; /// <summary> /// Point structure that receives the sizing step value of the band object. /// The vertical step value is placed in the y member, and the x member is ignored. /// The step value determines in what increments the band will be resized. /// </summary> /// <remarks> /// This member is ignored if dwModeFlags does not contain DBIMF_VARIABLEHEIGHT. /// </remarks> public POINT ptIntegral; /// <summary> /// Point structure that receives the ideal size of the band object. /// The ideal width is placed in the x member and the ideal height is placed in the y member. /// The band container will attempt to use these values, but the band is not guaranteed to be this size. /// </summary> public POINT ptActual; /// <summary> /// The title of the band. /// </summary> [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 255)] public String wszTitle; /// <summary> /// A value that receives a set of flags that define the mode of operation for the band object. /// </summary> /// <remarks> /// This must be one or a combination of the following values. /// DBIMF_NORMAL /// The band is normal in all respects. The other mode flags modify this flag. /// DBIMF_VARIABLEHEIGHT /// The height of the band object can be changed. The ptIntegral member defines the /// step value by which the band object can be resized. /// DBIMF_DEBOSSED /// The band object is displayed with a sunken appearance. /// DBIMF_BKCOLOR /// The band will be displayed with the background color specified in crBkgnd. /// </remarks> public DBIMF dwModeFlags; /// <summary> /// The background color of the band. /// </summary> /// <remarks> /// This member is ignored if dwModeFlags does not contain the DBIMF_BKCOLOR flag. /// </remarks> public COLORREF crBkgnd; /// <summary> /// The view mode of the band object. This is one of the following values. /// </summary> [Flags] public enum DBIF { /// <summary> /// Band object is displayed in a horizontal band. /// </summary> DBIF_VIEWMODE_NORMAL = 0x0000, /// <summary> /// Band object is displayed in a vertical band. /// </summary> DBIF_VIEWMODE_VERTICAL = 0x0001, /// <summary> /// Band object is displayed in a floating band. /// </summary> DBIF_VIEWMODE_FLOATING = 0x0002, /// <summary> /// Band object is displayed in a transparent band. /// </summary> DBIF_VIEWMODE_TRANSPARENT = 0x0004 } /// <summary> /// The set of flags that determine which members of this structure are being requested by the caller. One or more of the following values: /// </summary> [Flags] public enum DBIM { /// <summary> /// ptMinSize is requested. /// </summary> DBIM_MINSIZE = 0x0001, /// <summary> /// ptMaxSize is requested. /// </summary> DBIM_MAXSIZE = 0x0002, /// <summary> /// ptIntegral is requested. /// </summary> DBIM_INTEGRAL = 0x0004, /// <summary> /// ptActual is requested. /// </summary> DBIM_ACTUAL = 0x0008, /// <summary> /// wszTitle is requested. /// </summary> DBIM_TITLE = 0x0010, /// <summary> /// dwModeFlags is requested. /// </summary> DBIM_MODEFLAGS = 0x0020, /// <summary> /// crBkgnd is requested. /// </summary> DBIM_BKCOLOR = 0x0040 } /// <summary> /// A value that receives a set of flags that specify the mode of operation for the band object. One or more of the following values: /// </summary> [Flags] public enum DBIMF : uint { /// <summary> /// The band uses default properties. The other mode flags modify this flag. /// </summary> DBIMF_NORMAL = 0x0000, /// <summary> /// Windows XP and later: The band object is of a fixed sized and position. With this flag, a sizing grip is not displayed on the band object. /// </summary> DBIMF_FIXED = 0x0001, /// <summary> /// DBIMF_FIXEDBMP /// Windows XP and later: The band object uses a fixed bitmap (.bmp) file as its background. Note that backgrounds are not supported in all cases, so the bitmap may not be seen even when this flag is set. /// </summary> DBIMF_FIXEDBMP = 0x0004, /// <summary> /// The height of the band object can be changed. The ptIntegral member defines the step value by which the band object can be resized. /// </summary> DBIMF_VARIABLEHEIGHT = 0x0008, /// <summary> /// Windows XP and later: The band object cannot be removed from the band container. /// </summary> DBIMF_UNDELETEABLE = 0x0010, /// <summary> /// The band object is displayed with a sunken appearance. /// </summary> DBIMF_DEBOSSED = 0x0020, /// <summary> /// The band is displayed with the background color specified in crBkgnd. /// </summary> DBIMF_BKCOLOR = 0x0040, /// <summary> /// Windows XP and later: If the full band object cannot be displayed (that is, the band object is smaller than ptActual, a chevron is shown to indicate that there are more options available. These options are displayed when the chevron is clicked. /// </summary> DBIMF_USECHEVRON = 0x0080, /// <summary> /// Windows XP and later: The band object is displayed in a new row in the band container. /// </summary> DBIMF_BREAK = 0x0100, /// <summary> /// Windows XP and later: The band object is the first object in the band container. /// </summary> DBIMF_ADDTOFRONT = 0x0200, /// <summary> /// Windows XP and later: The band object is displayed in the top row of the band container. /// </summary> DBIMF_TOPALIGN = 0x0400, /// <summary> /// Windows Vista and later: No sizing grip is ever displayed to allow the user to move or resize the band object. /// </summary> DBIMF_NOGRIPPER = 0x0800, /// <summary> /// Windows Vista and later: A sizing grip that allows the user to move or resize the band object is always shown, even if that band object is the only one in the container. /// </summary> DBIMF_ALWAYSGRIPPER = 0x1000, /// <summary> /// Windows Vista and later: The band object should not display margins. /// </summary> DBIMF_NOMARGINS = 0x2000 } } }View Code
POINT：
// This code snippet was used by SharpShell. // using System.Runtime.InteropServices; namespace MyDiskInfo.Interop { /// <summary> /// The POINT structure defines the x- and y- coordinates of a point. /// </summary> [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)] public struct POINT { /// <summary> /// The x-coordinate of the point. /// </summary> public int X; /// <summary> /// The y-coordinate of the point. /// </summary> public int Y; } }View Code
RECT：
using System.Runtime.InteropServices; namespace MyDiskInfo.Interop { [StructLayout(LayoutKind.Sequential)] public struct RECT { public RECT(int left, int top, int right, int bottom) { this.left = left; this.top = top; this.right = right; this.bottom = bottom; } public int left, top, right, bottom; public int Width() { return right - left; } public int Height() { return bottom - top; } public void Offset(int x, int y) { left += x; right += x; top += y; bottom += y; } public void Set(int left, int top, int right, int bottom) { this.left = left; this.top = top; this.right = right; this.bottom = bottom; } public bool IsEmpty() { return Width() == 0 && Height() == 0; } } }View Code
Attributes：
using System; using System.Runtime.InteropServices; namespace MyDiskInfo { /// <summary> /// The display name of the extension and the description for the HelpText(displayed in status bar when menu command selected). /// </summary> [AttributeUsage(AttributeTargets.Class)] public class DeskBandInfoAttribute : System.Attribute { private string _displayName; private string _helpText; public string DisplayName { get { return _displayName; } } public string HelpText { get { return _helpText; } } public DeskBandInfoAttribute() { } public DeskBandInfoAttribute(string displayName, string helpText) { _displayName = displayName; _helpText = helpText; } } }View Code
ComImport：
using System; using System.Runtime.InteropServices; namespace MyDiskInfo.Interop { /// <summary> /// Provides a simple way to support communication between an object and its site in the container. /// </summary> [ComImport] [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] [Guid("FC4801A3-2BA9-11CF-A229-00AA003D7352")] public interface IObjectWithSite { /// <summary> /// Enables a container to pass an object a pointer to the interface for its site. /// </summary> /// <param name="pUnkSite">A pointer to the IUnknown interface pointer of the site managing this object. /// If NULL, the object should call Release on any existing site at which point the object no longer knows its site.</param> void SetSite([In, MarshalAs(UnmanagedType.IUnknown)] Object pUnkSite); /// <summary> /// Retrieves the latest site passed using SetSite. /// </summary> /// <param name="riid">The IID of the interface pointer that should be returned in ppvSite.</param> /// <param name="ppvSite">Address of pointer variable that receives the interface pointer requested in riid.</param> void GetSite(ref Guid riid, [MarshalAs(UnmanagedType.IUnknown)] out Object ppvSite); } /// <summary> /// Exposes a method that is used to communicate focus changes for a user input object contained in the Shell. /// </summary> [ComImport] [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] [Guid("F1DB8392-7331-11D0-8C99-00A0C92DBFE8")] public interface IInputObjectSite { /// <summary> /// Informs the browser that the focus has changed. /// </summary> /// <param name="punkObj">The address of the IUnknown interface of the object gaining or losing the focus.</param> /// <param name="fSetFocus">Indicates if the object has gained or lost the focus. If this value is nonzero, the object has gained the focus. /// If this value is zero, the object has lost the focus.</param> /// <returns>Returns S_OK if the method was successful, or a COM-defined error code otherwise.</returns> [PreserveSig] Int32 OnFocusChangeIS([MarshalAs(UnmanagedType.IUnknown)] Object punkObj, Int32 fSetFocus); } /// <summary> /// The IOleWindow interface provides methods that allow an application to obtain the handle to the various windows that participate in in-place activation, and also to enter and exit context-sensitive help mode. /// </summary> [ComImport] [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] [Guid("00000114-0000-0000-C000-000000000046")] public interface IOleWindow { /// <summary> /// Retrieves a handle to one of the windows participating in in-place activation (frame, document, parent, or in-place object window). /// </summary> /// <param name="phwnd">A pointer to a variable that receives the window handle.</param> /// <returns>This method returns S_OK on success.</returns> [PreserveSig] int GetWindow(out IntPtr phwnd); /// <summary> /// Determines whether context-sensitive help mode should be entered during an in-place activation session. /// </summary> /// <param name="fEnterMode">TRUE if help mode should be entered; FALSE if it should be exited.</param> /// <returns>This method returns S_OK if the help mode was entered or exited successfully, depending on the value passed in fEnterMode.</returns> [PreserveSig] int ContextSensitiveHelp(bool fEnterMode); } [ComImport] [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] [Guid("012DD920-7B26-11D0-8CA9-00A0C92DBFE8")] public interface IDockingWindow : IOleWindow { #region IOleWindow [PreserveSig] new int GetWindow(out IntPtr phwnd); [PreserveSig] new int ContextSensitiveHelp(bool fEnterMode); #endregion /// <summary> /// Instructs the docking window object to show or hide itself. /// </summary> /// <param name="fShow">TRUE if the docking window object should show its window. /// FALSE if the docking window object should hide its window and return its border space by calling SetBorderSpaceDW with zero values.</param> /// <returns>If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.</returns> [PreserveSig] int ShowDW([In] bool fShow); /// <summary> /// Notifies the docking window object that it is about to be removed from the frame. /// The docking window object should save any persistent information at this time. /// </summary> /// <param name="dwReserved">Reserved. This parameter should always be zero.</param> /// <returns>If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.</returns> [PreserveSig] int CloseDW([In] UInt32 dwReserved); /// <summary> /// Notifies the docking window object that the frame's border space has changed. /// </summary> /// <param name="prcBorder">Pointer to a RECT structure that contains the frame's available border space.</param> /// <param name="punkToolbarSite">Pointer to the site's IUnknown interface. The docking window object should call the QueryInterface method for this interface, requesting IID_IDockingWindowSite. /// The docking window object then uses that interface to negotiate its border space. It is the docking window object's responsibility to release this interface when it is no longer needed.</param> /// <param name="fReserved">Reserved. This parameter should always be zero.</param> /// <returns>If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.</returns> [PreserveSig] int ResizeBorderDW(RECT prcBorder, [In, MarshalAs(UnmanagedType.IUnknown)] IntPtr punkToolbarSite, bool fReserved); } /// <summary> /// Gets information about a band object. /// </summary> [ComImport] [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] [Guid("EB0FE172-1A3A-11D0-89B3-00A0C90A90AC")] public interface IDeskBand : IDockingWindow { #region IOleWindow [PreserveSig] new int GetWindow(out IntPtr phwnd); [PreserveSig] new int ContextSensitiveHelp(bool fEnterMode); #endregion #region IDockingWindow [PreserveSig] new int ShowDW([In] bool fShow); [PreserveSig] new int CloseDW([In] UInt32 dwReserved); [PreserveSig] new int ResizeBorderDW(RECT prcBorder, [In, MarshalAs(UnmanagedType.IUnknown)] IntPtr punkToolbarSite, bool fReserved); #endregion /// <summary> /// Gets state information for a band object. /// </summary> /// <param name="dwBandID">The identifier of the band, assigned by the container. The band object can retain this value if it is required.</param> /// <param name="dwViewMode">The view mode of the band object. One of the following values: DBIF_VIEWMODE_NORMAL, DBIF_VIEWMODE_VERTICAL, DBIF_VIEWMODE_FLOATING, DBIF_VIEWMODE_TRANSPARENT.</param> /// <param name="pdbi">Pointer to a DESKBANDINFO structure that receives the band information for the object. The dwMask member of this structure indicates the specific information that is being requested.</param> /// <returns>If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.</returns> [PreserveSig] int GetBandInfo(UInt32 dwBandID, DESKBANDINFO.DBIF dwViewMode, ref DESKBANDINFO pdbi); } /// <summary> /// Exposes methods to enable and query translucency effects in a deskband object. /// </summary> [ComImport] [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] [Guid("79D16DE4-ABEE-4021-8D9D-9169B261D657")] public interface IDeskBand2 : IDeskBand { #region IOleWindow [PreserveSig] new int GetWindow(out IntPtr phwnd); [PreserveSig] new int ContextSensitiveHelp(bool fEnterMode); #endregion #region IDockingWindow [PreserveSig] new int ShowDW([In] bool fShow); [PreserveSig] new int CloseDW([In] UInt32 dwReserved); [PreserveSig] new int ResizeBorderDW(RECT prcBorder, [In, MarshalAs(UnmanagedType.IUnknown)] IntPtr punkToolbarSite, bool fReserved); #endregion #region IDeskBand [PreserveSig] new int GetBandInfo(UInt32 dwBandID, DESKBANDINFO.DBIF dwViewMode, ref DESKBANDINFO pdbi); #endregion /// <summary> /// Indicates the deskband's ability to be displayed as translucent. /// </summary> /// <param name="pfCanRenderComposited">When this method returns, contains a BOOL indicating ability.</param> /// <returns>If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.</returns> [PreserveSig] int CanRenderComposited(out bool pfCanRenderComposited); /// <summary> /// Sets the composition state. /// </summary> /// <param name="fCompositionEnabled">TRUE to enable the composition state; otherwise, FALSE.</param> /// <returns>If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.</returns> [PreserveSig] int SetCompositionState(bool fCompositionEnabled); /// <summary> /// Gets the composition state. /// </summary> /// <param name="pfCompositionEnabled">When this method returns, contains a BOOL that indicates state.</param> /// <returns>If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.</returns> [PreserveSig] int GetCompositionState(out bool pfCompositionEnabled); } }View Code
DeskBand，這裡和GitHub上的程式不同的是，DeskBand直接繼承的ElementHost類，GitHub上的好像是多例的，我想要的是單例的，所以修改了一下。這裡粘的代碼是WPF的，如果你想實現Winform的，就讓DeskBand繼承UserControl，DeskBand代碼如下：
// Copyright(c) 2017 Patrick Becker // //
