WindowsPhone应用程序创建后生成的MainPage里有一个“/Images/appbar_button1.png”，这文件在哪？

求 SHAppBarMessage 这个API的用法~

这个函数很简单，关键是自己处理消息：
这样用：

function TAppBar.SendAppBarMsg(Msg: DWORD): UINT;
begin
Result := SHAppBarMessage(Msg, FABD);//FABD: TAppBarData;
end;

/////下面是消息处理：
procedure TAppBar.WndProc(var M: TMessage);
var
State: UINT;
begin
if M.Msg = AppBarMsg then
begin
case M.WParam of
// Sent when always on top or autohide state has changed.
ABN_STATECHANGE:
begin
// Check to see whether the access bar is still ABS_ALWAYSONTOP.
State := SendAppBarMsg(ABM_GETSTATE);
if ABS_ALWAYSONTOP and State = 0 then
SetTopMost(False)
else
SetTopMost(True);
end;
// A full screen application has started, or the last
// full-screen application has closed.
ABN_FULLSCREENAPP:
begin
// Set the access bar's z-order appropriately.
State := SendAppBarMsg(ABM_GETSTATE);
if M.lParam 0 then begin
if ABS_ALWAYSONTOP and State = 0 then
SetTopMost(False)
else
SetTopMost(True);
end
else
if State and ABS_ALWAYSONTOP 0 then
SetTopMost(True);
end;
// Sent when something happened which may effect the AppBar position.
ABN_POSCHANGED:
begin
// The taskbar or another access bar
// has changed its size or position.
SetAppBarPos(FABD.uEdge);
end;
end;
end
else
inherited WndProc(M);
end;



这里给出本单元完整代码：
unit AppBars;

interface

uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
ShellAPI, StdCtrls, Buttons, ExtCtrls, Menus;

type
TAppBarEdge = (abeTop, abeBottom, abeLeft, abeRight);

EAppBarError = class(Exception);

TAppBar = class(TForm)
PopupMenu1: TPopupMenu;
Top1: TMenuItem;
Bottom1: TMenuItem;
Left1: TMenuItem;
Right1: TMenuItem;
SpeedButton1: TSpeedButton;
SpeedButton2: TSpeedButton;
SpeedButton3: TSpeedButton;
SpeedButton4: TSpeedButton;
SpeedButton5: TSpeedButton;
OpenDialog1: TOpenDialog;
N1: TMenuItem;
Exit1: TMenuItem;
procedure Top1Click(Sender: TObject);
procedure SpeedButton1Click(Sender: TObject);
procedure MoveButtons;
procedure SpeedButton2Click(Sender: TObject);
procedure SpeedButton4Click(Sender: TObject);
procedure SpeedButton3Click(Sender: TObject);
procedure SpeedButton5Click(Sender: TObject);
procedure Exit1Click(Sender: TObject);
private
FABD: TAppBarData;
FEdge: TAppBarEdge;
FTopMost: Boolean;
FLastChecked: TMenuItem;
procedure WMActivate(var M: TMessage); message WM_ACTIVATE;
procedure WMWindowPosChanged(var M: TMessage); message WM_WINDOWPOSCHANGED;
function SendAppBarMsg(Msg: DWORD): UINT;
procedure SetAppBarPos(Edge: UINT);
procedure SetAppBarEdge(Value: TAppBarEdge);
protected
procedure CreateParams(var Params: TCreateParams); override;
procedure SetTopMost(TopMost: Boolean);
procedure WndProc(var M: TMessage); override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
published
property Edge: TAppBarEdge read FEdge write SetAppBarEdge;
property TopMost: Boolean read FTopMost write SetTopMost default True;
end;

var
AppBar: TAppBar;

implementation

{$R *.DFM}

uses Main;

const
DEF_APPBAR_WIDTH = 40;
DEF_APPBAR_HEIGHT = 35;

var
AppBarMsg: UINT = 0;

constructor TAppBar.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
// set up the TAppBarData record
with FABD do
begin
cbSize := SizeOf(FABD);
hWnd := Handle;
uCallbackMessage := AppBarMsg;
end;
// Inform the shell of the new AppBar
if SendAppBarMsg(ABM_NEW) = 0 then
raise EAppBarError.Create('Failed to create AppBar');
// Initialize the position
SetAppBarPos(ABE_TOP);
FTopMost := True;
FLastChecked := Top1;
end;

destructor TAppBar.Destroy;
begin
// Must inform shell that the AppBar is going away
SendAppBarMsg(ABM_REMOVE);
inherited Destroy;
end;

procedure TAppBar.WMWindowPosChanged(var M: TMessage);
begin
inherited;
// Must inform shell that the AppBar position has changed
SendAppBarMsg(ABM_WINDOWPOSCHANGED);
end;

procedure TAppBar.WMActivate(var M: TMessage);
begin
inherited;
// Must inform shell that the AppBar window was activated
SendAppBarMsg(ABM_ACTIVATE);
end;

procedure TAppBar.WndProc(var M: TMessage);
var
State: UINT;
begin
if M.Msg = AppBarMsg then
begin
case M.WParam of
// Sent when always on top or autohide state has changed.
ABN_STATECHANGE:
begin
// Check to see whether the access bar is still ABS_ALWAYSONTOP.
State := SendAppBarMsg(ABM_GETSTATE);
if ABS_ALWAYSONTOP and State = 0 then
SetTopMost(False)
else
SetTopMost(True);
end;
// A full screen application has started, or the last
// full-screen application has closed.
ABN_FULLSCREENAPP:
begin
// Set the access bar's z-order appropriately.
State := SendAppBarMsg(ABM_GETSTATE);
if M.lParam 0 then begin
if ABS_ALWAYSONTOP and State = 0 then
SetTopMost(False)
else
SetTopMost(True);
end
else
if State and ABS_ALWAYSONTOP 0 then
SetTopMost(True);
end;
// Sent when something happened which may effect the AppBar position.
ABN_POSCHANGED:
begin
// The taskbar or another access bar
// has changed its size or position.
SetAppBarPos(FABD.uEdge);
end;
end;
end
else
inherited WndProc(M);
end;

function TAppBar.SendAppBarMsg(Msg: DWORD): UINT;
begin
Result := SHAppBarMessage(Msg, FABD);
end;

procedure TAppBar.SetAppBarPos(Edge: UINT);
begin
FABD.uEdge := Edge; // set edage
with FABD.rc do
begin
// set coordinates to full-scren
Top := 0;
Left := 0;
Right := Screen.Width;
Bottom := Screen.Height;
// Send ABM_QUERYPOS to obtain proper rect on edge
SendAppBarMsg(ABM_QUERYPOS);
// re-adjust rect based on that modified by ABM_QUERYPOS
case Edge of
ABE_LEFT: Right := Left + DEF_APPBAR_WIDTH;
ABE_RIGHT: Left := Right - DEF_APPBAR_WIDTH;
ABE_TOP: Bottom := Top + DEF_APPBAR_HEIGHT;
ABE_BOTTOM: Top := Bottom - DEF_APPBAR_HEIGHT;
end;
// Set the app bar position.
SendAppBarMsg(ABM_SETPOS);
end;
// Set the BoundsRect property so that it conforms to the
// bounding rectangle passed to the system.
BoundsRect := FABD.rc;
end;

procedure TAppBar.SetTopMost(TopMost: Boolean);
const
WndPosArray: array[Boolean] of HWND = (HWND_BOTTOM, HWND_TOPMOST);
begin
SetWindowPos(Handle, WndPosArray[TopMost], 0, 0, 0, 0, SWP_NOMOVE or
SWP_NOSIZE or SWP_NOACTIVATE);
end;

procedure TAppBar.CreateParams(var Params: TCreateParams);
begin
inherited CreateParams(Params);
Params.ExStyle := WS_EX_TOOLWINDOW or WS_EX_TOPMOST;
Params.Style := WS_VISIBLE or WS_POPUP or WS_THICKFRAME or WS_CLIPCHILDREN;
end;

procedure TAppBar.SetAppBarEdge(Value: TAppBarEdge);
const
EdgeArray: array[TAppBarEdge] of UINT = (ABE_TOP, ABE_BOTTOM, ABE_LEFT,
ABE_RIGHT);
begin
if Value FEdge then
begin
SetAppBarPos(EdgeArray[Value]);
FEdge := Value;
MoveButtons;
end;
end;

procedure TAppBar.Top1Click(Sender: TObject);
begin
FLastChecked.Checked := False;
(Sender as TMenuItem).Checked := True;
case TMenuItem(Sender).Caption[2] of
'T': Edge := abeTop;
'B': Edge := abeBottom;
'L': Edge := abeLeft;
'R': Edge := abeRight;
end;
FLastChecked := TMenuItem(Sender);
end;

procedure TAppBar.MoveButtons;
// This method looks complicated, but it really just arranges the buttons
// properly depending on what side the AppBar is docked.
var
DeltaCenter, NewPos: Integer;
begin
if (FEdge = abeTop) or (FEdge = abeBottom) then
begin
DeltaCenter := (ClientHeight - SpeedButton1.Height) div 2;
SpeedButton1.SetBounds(10, DeltaCenter, SpeedButton1.Width, SpeedButton1.Height);
NewPos := SpeedButton1.Width + 20;
SpeedButton2.SetBounds(NewPos, DeltaCenter, SpeedButton1.Width, SpeedButton1.Height);
NewPos := NewPos + SpeedButton1.Width + 10;
SpeedButton3.SetBounds(NewPos, DeltaCenter, SpeedButton1.Width, SpeedButton1.Height);
NewPos := NewPos + SpeedButton1.Width + 10;
SpeedButton4.SetBounds(NewPos, DeltaCenter, SpeedButton1.Width, SpeedButton1.Height);
NewPos := NewPos + SpeedButton1.Width + 10;
SpeedButton5.SetBounds(NewPos, DeltaCenter, SpeedButton1.Width, SpeedButton1.Height);
end;
if (FEdge = abeLeft) or (FEdge = abeRight) then
begin
DeltaCenter := (ClientWidth - SpeedButton1.Width) div 2;
SpeedButton1.SetBounds(DeltaCenter, 10, SpeedButton1.Width, SpeedButton1.Height);
NewPos := SpeedButton1.Height + 20;
SpeedButton2.SetBounds(DeltaCenter, NewPos, SpeedButton1.Width, SpeedButton1.Height);
NewPos := NewPos + SpeedButton1.Height + 10;
SpeedButton3.SetBounds(DeltaCenter, NewPos, SpeedButton1.Width, SpeedButton1.Height);
NewPos := NewPos + SpeedButton1.Height + 10;
SpeedButton4.SetBounds(DeltaCenter, NewPos, SpeedButton1.Width, SpeedButton1.Height);
NewPos := NewPos + SpeedButton1.Height + 10;
SpeedButton5.SetBounds(DeltaCenter, NewPos, SpeedButton1.Width, SpeedButton1.Height);
end;
end;

procedure TAppBar.SpeedButton1Click(Sender: TObject);
begin
if OpenDialog1.Execute then
MainForm.FileName := OpenDialog1.FileName;
end;

procedure TAppBar.SpeedButton2Click(Sender: TObject);
begin
MainForm.memEditor.Lines.SaveToFile(MainForm.FileName);
end;

procedure TAppBar.SpeedButton3Click(Sender: TObject);
begin
MainForm.memEditor.CutToClipboard;
end;

procedure TAppBar.SpeedButton4Click(Sender: TObject);
begin
MainForm.memEditor.CopyToClipboard;
end;

procedure TAppBar.SpeedButton5Click(Sender: TObject);
begin
MainForm.memEditor.PasteFromClipboard;
end;

procedure TAppBar.Exit1Click(Sender: TObject);
begin
Application.Terminate;
end;

initialization
AppBarMsg := RegisterWindowMessage('DDG AppBar Message');
end.

　　本主题介绍如何创建可以在应用程序的多个页面上重用的全局应用程序栏。通常，您是在要使用应用程序栏的页面上创建应用程序栏，并将该应用程序栏只应用于该页面。出于本示例的目的，您使用 XAML 在 App.xaml 中创建一个全局应用程序栏。在您的应用程序中，还可以通过使用 App.xaml 代码隐藏文件中的唯一代码创建全局应用程序栏。有关更多信息，请参见 Windows Phone 的应用栏。注意：由于Pivot“页面”实际上是单个页面上的单个控件，因此不同的 Pivot“页面”自动使用相同的应用程序栏。有关更多信息，请参见如何在 Windows Phone 的单个 Pivot 控件中使用不同的应用栏。创建可以在多个页面上重用的全局应用程序栏的步骤在“解决方案资源管理器”中，双击 App.xaml 以在设计器中打开它。在Application.Resources 元素中，添加以下代码。该代码创建一个具有两个按钮和两个菜单项的应用程序栏。该代码为该应用程序栏指定键 GlobalAppBar，但您可以为它指定您喜欢的任何键。XAML在“解决方案资源管理器”中，右键单击 App.xaml，然后单击“查看代码”以打开代码隐藏文件。在App 类中，添加以下代码。这些是单击事件的处理程序。C#VBprivatevoid Button1_Click(object sender, EventArgs e) { MessageBox.Show("Button 1 works!"); //Do work for your application here. } privatevoid Button2_Click(object sender, EventArgs e) { MessageBox.Show("Button 2 works!"); //Do work for your application here. } privatevoid MenuItem1_Click(object sender, EventArgs e) { MessageBox.Show("Menu item 1 works!"); //Do work for your application here. } privatevoid MenuItem2_Click(object sender, EventArgs e) { MessageBox.Show("Menu item 2 works!"); //Do work for your application here. } 在页面上使用全局应用程序栏的步骤在“解决方案资源管理器”中，双击您要向其中添加应用程序栏的任何页面。

你是不知道图片的访问路径应该怎么写吗?
先从简单的入手的话 新建一个项目时，在项目中新建一个文件夹如Images，就可以了，
至于路径，只举两个简单应用
在Images中你放入两张图片，叫A.png ,B.png

A的属性 BuildAction 设置为Content Copy 设置为Copy if newer

B的属性 BuildAction 设置为Resource Copy 设置为not
在Xaml页面中你创建一个Image对象
你可以通过路径 /Images/A.png 或 Images/A.png 或 ./Images/A.png 都可以访问到A.B
不过如果对象是ApplicationBar上的IconUri 则可以通过路径/Images/A.png ，B为资源不会显示
建议再多学习一下。这只是未跨程序集的情况。

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