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<html><head><script language="JavaScript"> function reset(){ for ( var i=0; i < document.Form1.elements.length; i++ ) { document.Form1.elements[i].options[0].selected=true }}function going(url){ parent.location=url; reset();}</script><style><!--A:link {text-decoration: none; color: #000000; font-family: 宋体}A:visited {text-decoration: none; color: #000000; font-family: 宋体}A:active {text-decoration: none; font-family: 宋体}A:hover {text-decoration: underline:#ffffff; color: #ff0000}body,table {font-size: 9pt; font-family: 宋体}.H1 {font-size: 9pt ; line-height:9pt; align=center}.ourfont {font-size: 9pt ; line-height:9pt; }.ourfont1 {font-size: 9pt ; line-height:9pt; }--></style><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title>如何在DELPHI中使用系统状态栏图标</title></head><body topmargin="0" leftmargin="0"><div align="center"><center><table border="0" cellPadding="0" cellSpacing="0" width="700"><tbody> <tr> <td><p class="content4"><span class="font"><img border="0" height="3" src="../../soft/pix.gif" width="700"></span></td> </tr></tbody></table></center></div><div align="center"><center><table border="0" cellPadding="0" cellSpacing="0" width="700"><tbody> <tr> <td bgColor="#3399ff" width="658"><p class="ourfont"><span class="font"> </span><a style="text-decoration: none; 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text-decoration: none" href="../technic/H00706-3.htm">技术交流 </a><a style="color: rgb(255,255,255); text-decoration: none" href="http://202.100.13.77/clslyb/default.asp?clsid=jiaoc"><font color="#FFFFFF"><strong>过客留言</strong></font></a></td> <td bgColor="#3399ff" width="32"><p align="center" class="ourfont"><a href="mailto:net@163.sn.cn"><img src="../../soft/email.gif" alt="email.gif (493 字节)" border="0" WIDTH="20" HEIGHT="19"></a></td> </tr></tbody></table></center></div><div align="center"><center><table border="1" cellSpacing="1" width="700" bordercolor="#3399FF"><tbody> <tr> <td align="left" bgColor="#FFFFFF" vAlign="top" width="700" bordercolor="#0000FF" bordercolorlight="#0000FF" bordercolordark="#0000FF"><p class="ourfont"> </p> <p align="center">如何在DELPHI中使用系统状态栏图标<br> <br> 陆坦 </p> <p><br> ----SYSTRAY ICON就是在WINDOWS 95桌面系统下边状态栏右边的区域，通常这里有输入法和时间的小图标。程序中增加使用该功能时，须在USES中添加`SHELLAPI`。添加图标时需要的函数是: Shell_NotifyIconA，它需要2个参数，一个参数是`TNotifyIconDataA`的结构，该结构如下：<br> TNOTIFYICONDATAA = record<br> cbSize: DWORD;<br> Wnd: HWND;<br> uID: UINT;<br> uFlags: UINT;<br> uCallbackMessage: UINT;<br> hIcon: HICON;<br> szTip: array [0..63] of AnsiChar;<br> end;<br> <br> ----cbSize是该结构的长度；Wnd是调用Shell_NotifyIconA函数的窗口的Handle；uID是用户自定义的一个数值，在uCallbackMessage参数指定的消息中使用；uCallbackMessage是一个参数，当添加的图标上出现鼠标事件时，系统向Wnd参数指定的窗口发送一个消息，该消息的Msg参数是uCallbackMessage，该消息的wParam参数是uID，该消息的lParam参数是鼠标事件的Msg值。这样应用程序可使用几个图标，但只用一个消息处理函数，通过wParam参数决定处理哪一个图标的消息。uFlags是该结构中哪些项目有效，若有NIF_MESSAGE则uCallbackMessage参数是有效的；若有NIF_ICON则hIcon参数是有效的；若有NIF_TIP则szTip参数有效。<br> <br> ----uCallbackMessage是发送到Wnd参数所指定的窗口的消息。hIcon是出现系统状态栏的图标的Handle。<br> <br> ----szTip是当鼠标停留在系统状态栏图标上时，出现的提示。<br> <br> ----该结构添好后，可调用Shell_NotifyIconA函数，格式为：<br> <br> Shell_NotifyIconA(dwMessage:<br> DWORD;lpData:PNotifyIconDataA)<br> dwMessage取值为<br> NIM_ADD：增加一个新图标<br> NIM_MODIFY：修改一个已有的图标<br> NIM_DELETE：删除一个已有的图标<br> <br> <br> ----下面给出一个演示程序，该程序有两个按钮、一个弹出式菜单和一个Image构件。一个按钮用于添加图标，一个按钮用于删除图标，Image构件内有一个图标(从Delphi自带的图标中装入)，在图标上用鼠标右键单击时，会弹出一个菜单。程序中自定义一个消息处理函数处理系统状态栏图标消息。<br> --------------------------------------------------------<br> unit Unit1;<br> <br> interface<br> <br> uses<br> Windows, Messages, SysUtils, <br> Classes, Graphics, Controls, Forms, Dialogs,<br> StdCtrls, ShellApi, ExtCtrls, Menus;<br> <br> const mymsg=wm_user+1;iid=100;<br> type<br> TForm1 = class(TForm)<br> Button1: TButton;<br> Button2: TButton;<br> Image1: TImage;<br> PopupMenu1: TPopupMenu;<br> a1: TMenuItem;<br> b1: TMenuItem;<br> c1: TMenuItem;<br> procedure Button1Click(Sender: TObject);<br> procedure Button2Click(Sender: TObject);<br> private<br> procedure mymessage(var message:<br> tmessage);message mymsg;<br> public<br> { Public declarations }<br> end;<br> var<br> Form1: TForm1;ntid:tnotifyicondataa;<br> <br> implementation<br> <br> {$R *.DFM}<br> <br> procedure TForm1.mymessage(var message:tmessage);<br> var mypt:tpoint;<br> begin<br> inherited;<br> if message.lparam=wm_rbuttonup then begin<br> getcursorpos(mypt);<br> popupmenu1.popup(mypt.x,mypt.y);end;<br> message.Result:=0;<br> end;<br> <br> procedure TForm1.Button1Click(Sender: TObject);<br> begin<br> ntid.cbSize:=sizeof(tnotifyicondataa);<br> ntid.Wnd:=handle;<br> ntid.uID:=iid;<br> ntid.uFlags:=nif_icon+nif_tip+nif_message;<br> ntid.uCallbackMessage:=mymsg;<br> ntid.hIcon:=image1.Picture.Icon.handle;<br> ntid.szTip:=`asdf`;<br> shell_notifyicona(NIM_ADD,@ntid);<br> end;<br> <br> procedure TForm1.Button2Click(Sender: TObject);<br> begin<br> ntid.cbSize:=sizeof(tnotifyicondataa);<br> ntid.Wnd:=handle;<br> ntid.uID:=iid;<br> ntid.uFlags:=nif_icon+nif_tip+nif_message;<br> ntid.uCallbackMessage:=mymsg;<br> ntid.hIcon:=image1.Picture.Icon.handle;<br> ntid.szTip:=`asdf`;<br> shell_notifyicona(NIM_DELETE,@ntid);<br> end;<br> <br> end</td> </tr></tbody></table></center></div><hr align="center" SIZE="1" width="700"><p align="center" class="ourfont"><span><span><font color="#000000"> <a style="color: rgb(0,0,0); 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