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#include <Shellapi.h> // for task icon

#pragma comment (lib, "Shell32.lib")

#define WM_TRAYICON WM_USER + 1
#define ICON_ID 1


BOOL
TrayIcon (HWND hwnd, HICON hIcon, DWORD dwMsg)
{
NOTIFYICONDATA nid = {0};
nid.cbSize = sizeof (NOTIFYICONDATA);
nid.hWnd = hwnd;
nid.uID = ICON_ID;
nid.uFlags = NIF_TIP | NIF_ICON | NIF_MESSAGE;
nid.uCallbackMessage = WM_TRAYICON;
nid.hIcon = hIcon;

lstrcpy (nid.szTip, "CloneHv -v1\nA software simulating LPR");
return Shell_NotifyIcon (dwMsg, &nid);
}


void
OnTrayIcon (UINT uIconId, UINT uMsg)
{
if (uIconId == ICON_ID) {
if (uMsg == WM_LBUTTONUP) {
ShowWindow (g_hwndDlg, SW_SHOWNORMAL);
SetForegroundWindow (g_hwndDlg);
}
}
}


void
OnSize (WPARAM wFlag, WORD wWidth, WORD wHeight)
{
if (wFlag == SIZE_MINIMIZED) {
ShowWindow (g_hwndDlg, SW_HIDE);
}
}


HWND g_hwndDlg = NULL;
HICON g_hIcon = NULL;

WM_INITDIALOG:
hwndDlg = hwndDlg;
g_hIcon = ::LoadIcon (g_hInst, MAKEINTRESOURCE (IDI_ICON1));
TrayIcon (hwnd, g_hIcon, NIM_ADD);

WM_SIZE:
case WM_SIZE:
OnSize (wParam, LOWORD (lParam), HIWORD (wParam));

WM_CLOSE:
TrayIcon (g_hwndDlg, g_hIcon, NIM_DELETE);
DestroyIcon (g_hIcon);
return TRUE;

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轉載于:https://www.cnblogs.com/lin1270/archive/2012/02/20/2359409.html

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