unit1.cpp

本书《C++Builder与WindowsAPI经典范例》附含配套光盘包括132个WindowsAPI函数及206个完整、可执行的实例

//---------------------------------------------------------------------------
//程序目的：制造一状态栏小图标(TrayIcon)，并可执行POP菜单功能
#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//当成功制作一新TrayIcon时的识别ID-------------------------------------------
const int WM_TRAYID = WM_USER + 100;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
    : TForm(Owner)
{
}
//-----------------------------------------------------------------------------------
void __fastcall TForm1::FormShow(TObject *Sender)
{
//新建一个图示，用来获取ImageList1中的图像
TrayIcon = new Graphics::TIcon;
//自定义函数--第一次即为快捷键自定义的TrayIcon
AddorChangeIcon(0);
//将快捷工具栏上的母窗口Project1隐藏
::ShowWindow(Application->Handle, SW_HIDE);
}
//---------------------------------------------------------------------------
void __fastcall TForm1::FormClose(TObject *Sender, TCloseAction &Action)
{//对等于现存的TrayIcon结构数据
NOTIFYICONDATA tray;
tray.cbSize = sizeof(tray);
tray.uID =  WM_TRAYID;//自定义ID
tray.hWnd = Handle;
tray.hIcon = TrayIcon->Handle;
//依此结构，即进行删除此TrayIcon
::Shell_NotifyIcon(NIM_DELETE, &tray);
delete TrayIcon;//删除程序开始时新建的图标组件
ShowMessage("关闭本TrayIcon程序测试！");
}
//---------------------------------------------------------------------------
//新建或更新自定义的TrayIcon
void __fastcall TForm1::AddorChangeIcon(int iconNum)
{
//在程序结束前，将此布尔变量及整数变量的保存位置固定住